mimxrt/machine_uart: Add the UART class to the machine module.
The implementation uses the LPUARTx devices. Up to 8 UARTs can be used,
given that the pins are accessible. E.g. 8 on Teensy 4.1, 5 on
MIMXRT1020_EVK.
For Tennsy 4.0 and 4.1 the UART numbers are as printed on the pinout 1..N.
The MIMXRT10xx-EVK boards have only one UART named, which gets the number
1. All other UART are assigned to different Pins:
MIMXRT1010-EVK:
D0/D1 UART 1
D6/D7 UART 2
A0/D4 UART 3
MIMXRT1020-EVK:
D0/D1 UART 1
D6/D9 UART 2
D10/D12 UART 3
D14/D15 UART 4
A0/A1 UART 5
MIMXRT1050-EVK, MIMXRT1060-EVK, MIMXRT1064-EVK:
D0/D1 UART 1
D7/D6 UART 2
D8/D9 UART 3
A1/A0 UART 4
This commit is contained in:
robert-hh
Damien George
parent
d2dcd05adc
commit
689476c576
@ -140,6 +140,7 @@ SRC_C = \
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machine_pin.c \
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machine_rtc.c \
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machine_timer.c \
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machine_uart.c \
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mimxrt_flash.c \
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modutime.c \
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modmachine.c \
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@ -263,6 +264,7 @@ SRC_QSTR += \
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machine_pin.c \
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machine_rtc.c \
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machine_timer.c \
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machine_uart.c \
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mimxrt_flash.c \
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modutime.c \
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modmachine.c \
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@ -8,3 +8,17 @@
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#define MICROPY_HW_LED_ON(pin) (mp_hal_pin_high(pin))
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#define MICROPY_HW_LED_OFF(pin) (mp_hal_pin_low(pin))
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#define BOARD_FLASH_CONFIG_HEADER_H "evkmimxrt1010_flexspi_nor_config.h"
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// Define mapping logical UART # to hardware UART #
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// LPUART1 on D0/D1 -> 1
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// LPUART3 on A0/D4 -> 3
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// LPUART4 on D6/D7 -> 2
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#define MICROPY_HW_UART_NUM (sizeof(uart_index_table) / sizeof(uart_index_table)[0])
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#define MICROPY_HW_UART_INDEX { 0, 1, 4, 3 }
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#define IOMUX_TABLE_UART \
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{ IOMUXC_GPIO_10_LPUART1_TXD }, { IOMUXC_GPIO_09_LPUART1_RXD }, \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_08_LPUART3_TXD }, { IOMUXC_GPIO_AD_07_LPUART3_RXD }, \
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{ IOMUXC_GPIO_AD_02_LPUART4_TXD }, { IOMUXC_GPIO_AD_01_LPUART4_RXD },
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@ -34,24 +34,3 @@ PWM_CB,GPIO_05
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ENC_A,GPIO_AD_05
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ENC_B,GPIO_AD_06
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LED_GREEN,GPIO_11
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GPIO_01,GPIO_01
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GPIO_02,GPIO_02
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GPIO_03,GPIO_03
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GPIO_04,GPIO_04
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GPIO_05,GPIO_05
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GPIO_06,GPIO_06
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GPIO_08,GPIO_08
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GPIO_09,GPIO_09
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GPIO_10,GPIO_10
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GPIO_11,GPIO_11
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GPIO_AD_01,GPIO_AD_01
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GPIO_AD_02,GPIO_AD_02
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GPIO_AD_03,GPIO_AD_03
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GPIO_AD_04,GPIO_AD_04
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GPIO_AD_05,GPIO_AD_05
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GPIO_AD_06,GPIO_AD_06
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GPIO_AD_07,GPIO_AD_07
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GPIO_AD_09,GPIO_AD_09
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GPIO_AD_10,GPIO_AD_10
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GPIO_AD_14,GPIO_AD_14
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GPIO_SD_02,GPIO_SD_02
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@ -9,3 +9,24 @@
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#define MICROPY_HW_LED_ON(pin) (mp_hal_pin_low(pin))
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#define MICROPY_HW_LED_OFF(pin) (mp_hal_pin_high(pin))
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#define BOARD_FLASH_CONFIG_HEADER_H "evkmimxrt1020_flexspi_nor_config.h"
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// Define mapping logical UART # to hardware UART #
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// D3/D5 LPUART1 Not usable, Since D3 is blocked.
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// D0/D1 LPUART2 -> 1
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// D6/D9 LPUART3 -> 2
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// D10/D12 LPUART5 -> 3
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// D14/D15 LPUART8 -> 4
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// A0/A1 LPUART4 -> 5
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#define MICROPY_HW_UART_NUM (sizeof(uart_index_table) / sizeof(uart_index_table)[0])
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#define MICROPY_HW_UART_INDEX { 0, 2, 3, 5, 8, 4 }
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#define IOMUX_TABLE_UART \
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{ IOMUXC_GPIO_AD_B0_06_LPUART1_TX }, { IOMUXC_GPIO_AD_B0_07_LPUART1_RX }, \
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{ IOMUXC_GPIO_AD_B1_08_LPUART2_TX }, { IOMUXC_GPIO_AD_B1_09_LPUART2_RX }, \
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{ IOMUXC_GPIO_AD_B0_14_LPUART3_TX }, { IOMUXC_GPIO_AD_B0_15_LPUART3_RX }, \
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{ IOMUXC_GPIO_AD_B1_10_LPUART4_TX }, { IOMUXC_GPIO_AD_B1_11_LPUART4_RX }, \
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{ IOMUXC_GPIO_AD_B0_10_LPUART5_TX }, { IOMUXC_GPIO_AD_B0_11_LPUART5_RX }, \
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{ 0 }, { 0 }, \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_SD_B1_02_LPUART8_TX }, { IOMUXC_GPIO_SD_B1_03_LPUART8_RX },
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@ -8,3 +8,22 @@
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#define MICROPY_HW_LED_ON(pin) (mp_hal_pin_low(pin))
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#define MICROPY_HW_LED_OFF(pin) (mp_hal_pin_high(pin))
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#define BOARD_FLASH_CONFIG_HEADER_H "evkmimxrt1050_flexspi_nor_config.h"
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// Define mapping logical UART # to hardware UART #
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// LPUART3 on D0/D1 -> 1
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// LPUART2 on D7/D6 -> 2
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// LPUART6 on D8/D9 -> 3
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// LPUART8 on A1/A0 -> 4
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#define MICROPY_HW_UART_NUM (sizeof(uart_index_table) / sizeof(uart_index_table)[0])
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#define MICROPY_HW_UART_INDEX { 0, 3, 2, 6, 8 }
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#define IOMUX_TABLE_UART \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_AD_B1_02_LPUART2_TX }, { IOMUXC_GPIO_AD_B1_03_LPUART2_RX }, \
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{ IOMUXC_GPIO_AD_B1_06_LPUART3_TX }, { IOMUXC_GPIO_AD_B1_07_LPUART3_RX }, \
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{ 0 }, { 0 }, \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_AD_B0_02_LPUART6_TX }, { IOMUXC_GPIO_AD_B0_03_LPUART6_RX }, \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_AD_B1_10_LPUART8_TX }, { IOMUXC_GPIO_AD_B1_11_LPUART8_RX },
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@ -29,23 +29,3 @@ SDI,GPIO_SD_B0_03
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SDO,GPIO_SD_B0_02
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CS,GPIO_SD_B0_01
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LED_GREEN,GPIO_AD_B0_09
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GPIO_AD_B1_07,GPIO_AD_B1_07
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GPIO_AD_B1_06,GPIO_AD_B1_06
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GPIO_AD_B0_11,GPIO_AD_B0_11
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GPIO_AD_B1_08,GPIO_AD_B1_08
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GPIO_AD_B0_09,GPIO_AD_B0_09
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GPIO_AD_B0_10,GPIO_AD_B0_10
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GPIO_AD_B1_02,GPIO_AD_B1_02
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GPIO_AD_B1_03,GPIO_AD_B1_03
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GPIO_AD_B0_03,GPIO_AD_B0_03
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GPIO_AD_B0_02,GPIO_AD_B0_02
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GPIO_SD_B0_01,GPIO_SD_B0_01
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GPIO_SD_B0_02,GPIO_SD_B0_02
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GPIO_SD_B0_03,GPIO_SD_B0_03
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GPIO_SD_B0_00,GPIO_SD_B0_00
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GPIO_AD_B1_01,GPIO_AD_B1_01
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GPIO_AD_B1_00,GPIO_AD_B1_00
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GPIO_AD_B1_10,GPIO_AD_B1_10
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GPIO_AD_B1_11,GPIO_AD_B1_11
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GPIO_AD_B1_04,GPIO_AD_B1_04
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GPIO_AD_B1_05,GPIO_AD_B1_05
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@ -8,3 +8,22 @@
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#define MICROPY_HW_LED_ON(pin) (mp_hal_pin_low(pin))
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#define MICROPY_HW_LED_OFF(pin) (mp_hal_pin_high(pin))
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#define BOARD_FLASH_CONFIG_HEADER_H "evkmimxrt1060_flexspi_nor_config.h"
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// Define mapping logical UART # to hardware UART #
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// LPUART3 on D0/D1 -> 1
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// LPUART2 on D7/D6 -> 2
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// LPUART6 on D8/D9 -> 3
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// LPUART8 on A1/A0 -> 4
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#define MICROPY_HW_UART_NUM (sizeof(uart_index_table) / sizeof(uart_index_table)[0])
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#define MICROPY_HW_UART_INDEX { 0, 3, 2, 6, 8 }
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#define IOMUX_TABLE_UART \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_AD_B1_02_LPUART2_TX }, { IOMUXC_GPIO_AD_B1_03_LPUART2_RX }, \
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{ IOMUXC_GPIO_AD_B1_06_LPUART3_TX }, { IOMUXC_GPIO_AD_B1_07_LPUART3_RX }, \
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{ 0 }, { 0 }, \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_AD_B0_02_LPUART6_TX }, { IOMUXC_GPIO_AD_B0_03_LPUART6_RX }, \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_AD_B1_10_LPUART8_TX }, { IOMUXC_GPIO_AD_B1_11_LPUART8_RX },
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@ -29,23 +29,3 @@ SDI,GPIO_SD_B0_03
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SDO,GPIO_SD_B0_02
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CS,GPIO_SD_B0_01
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LED_GREEN,GPIO_AD_B0_09
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GPIO_AD_B1_07,GPIO_AD_B1_07
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GPIO_AD_B1_06,GPIO_AD_B1_06
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GPIO_AD_B0_11,GPIO_AD_B0_11
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GPIO_AD_B1_08,GPIO_AD_B1_08
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GPIO_AD_B0_09,GPIO_AD_B0_09
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GPIO_AD_B0_10,GPIO_AD_B0_10
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GPIO_AD_B1_02,GPIO_AD_B1_02
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GPIO_AD_B1_03,GPIO_AD_B1_03
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GPIO_AD_B0_03,GPIO_AD_B0_03
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GPIO_AD_B0_02,GPIO_AD_B0_02
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GPIO_SD_B0_01,GPIO_SD_B0_01
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GPIO_SD_B0_02,GPIO_SD_B0_02
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GPIO_SD_B0_03,GPIO_SD_B0_03
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GPIO_SD_B0_00,GPIO_SD_B0_00
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GPIO_AD_B1_01,GPIO_AD_B1_01
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GPIO_AD_B1_00,GPIO_AD_B1_00
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GPIO_AD_B1_10,GPIO_AD_B1_10
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GPIO_AD_B1_11,GPIO_AD_B1_11
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GPIO_AD_B1_04,GPIO_AD_B1_04
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GPIO_AD_B1_05,GPIO_AD_B1_05
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@ -1,9 +1,27 @@
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#define MICROPY_HW_BOARD_NAME "i.MX RT1064 EVK"
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#define MICROPY_HW_MCU_NAME "MIMXRT1064DVL6A"
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// MIMXRT1064_EVK has 1 user LED
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#define MICROPY_HW_LED1_PIN (pin_GPIO_AD_B0_09)
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#define MICROPY_HW_LED_ON(pin) (mp_hal_pin_low(pin))
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#define MICROPY_HW_LED_OFF(pin) (mp_hal_pin_high(pin))
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#define BOARD_FLASH_CONFIG_HEADER_H "evkmimxrt1064_flexspi_nor_config.h"
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// Define mapping logical UART # to hardware UART #
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// LPUART3 on D0/D1 -> 1
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// LPUART2 on D7/D6 -> 2
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// LPUART6 on D8/D9 -> 3
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// LPUART8 on A1/A0 -> 4
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#define MICROPY_HW_UART_NUM (sizeof(uart_index_table) / sizeof(uart_index_table)[0])
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#define MICROPY_HW_UART_INDEX { 0, 3, 2, 6, 8 }
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#define IOMUX_TABLE_UART \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_AD_B1_02_LPUART2_TX }, { IOMUXC_GPIO_AD_B1_03_LPUART2_RX }, \
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{ IOMUXC_GPIO_AD_B1_06_LPUART3_TX }, { IOMUXC_GPIO_AD_B1_07_LPUART3_RX }, \
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{ 0 }, { 0 }, \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_AD_B0_02_LPUART6_TX }, { IOMUXC_GPIO_AD_B0_03_LPUART6_RX }, \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_AD_B1_10_LPUART8_TX }, { IOMUXC_GPIO_AD_B1_11_LPUART8_RX },
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@ -29,23 +29,3 @@ SDI,GPIO_SD_B0_03
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SDO,GPIO_SD_B0_02
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CS,GPIO_SD_B0_01
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LED_GREEN,GPIO_AD_B0_09
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GPIO_AD_B1_07,GPIO_AD_B1_07
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GPIO_AD_B1_06,GPIO_AD_B1_06
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GPIO_AD_B0_11,GPIO_AD_B0_11
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GPIO_AD_B1_08,GPIO_AD_B1_08
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GPIO_AD_B0_09,GPIO_AD_B0_09
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GPIO_AD_B0_10,GPIO_AD_B0_10
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GPIO_AD_B1_02,GPIO_AD_B1_02
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GPIO_AD_B1_03,GPIO_AD_B1_03
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GPIO_AD_B0_03,GPIO_AD_B0_03
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GPIO_AD_B0_02,GPIO_AD_B0_02
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GPIO_SD_B0_01,GPIO_SD_B0_01
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GPIO_SD_B0_02,GPIO_SD_B0_02
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GPIO_SD_B0_03,GPIO_SD_B0_03
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GPIO_SD_B0_00,GPIO_SD_B0_00
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GPIO_AD_B1_01,GPIO_AD_B1_01
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GPIO_AD_B1_00,GPIO_AD_B1_00
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GPIO_AD_B1_10,GPIO_AD_B1_10
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GPIO_AD_B1_11,GPIO_AD_B1_11
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GPIO_AD_B1_04,GPIO_AD_B1_04
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GPIO_AD_B1_05,GPIO_AD_B1_05
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@ -8,3 +8,17 @@
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#define MICROPY_HW_LED_ON(pin) (mp_hal_pin_high(pin))
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#define MICROPY_HW_LED_OFF(pin) (mp_hal_pin_low(pin))
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#define BOARD_FLASH_CONFIG_HEADER_H "teensy40_flexspi_nor_config.h"
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// UART config: 7 UARTs at the pins for Teensy 4.0
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#define MICROPY_HW_UART_NUM (sizeof(uart_index_table) / sizeof(uart_index_table)[0])
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#define MICROPY_HW_UART_INDEX { 0, 6, 4, 2, 3, 8, 1, 7 }
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#define IOMUX_TABLE_UART \
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{ IOMUXC_GPIO_AD_B0_12_LPUART1_TX }, { IOMUXC_GPIO_AD_B0_13_LPUART1_RX }, \
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{ IOMUXC_GPIO_AD_B1_02_LPUART2_TX }, { IOMUXC_GPIO_AD_B1_03_LPUART2_RX }, \
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{ IOMUXC_GPIO_AD_B1_06_LPUART3_TX }, { IOMUXC_GPIO_AD_B1_07_LPUART3_RX }, \
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{ IOMUXC_GPIO_B1_00_LPUART4_TX }, { IOMUXC_GPIO_B1_01_LPUART4_RX }, \
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{ 0 }, { 0 }, \
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{ IOMUXC_GPIO_AD_B0_02_LPUART6_TX }, { IOMUXC_GPIO_AD_B0_03_LPUART6_RX }, \
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{ IOMUXC_GPIO_EMC_31_LPUART7_TX }, { IOMUXC_GPIO_EMC_32_LPUART7_RX }, \
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{ IOMUXC_GPIO_AD_B1_10_LPUART8_TX }, { IOMUXC_GPIO_AD_B1_11_LPUART8_RX },
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@ -8,3 +8,17 @@
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#define MICROPY_HW_LED_ON(pin) (mp_hal_pin_high(pin))
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#define MICROPY_HW_LED_OFF(pin) (mp_hal_pin_low(pin))
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#define BOARD_FLASH_CONFIG_HEADER_H "teensy41_flexspi_nor_config.h"
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// UART config: 8 UARTs at the pins for Teensy 4.1
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#define MICROPY_HW_UART_NUM (sizeof(uart_index_table) / sizeof(uart_index_table)[0])
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#define MICROPY_HW_UART_INDEX { 0, 6, 4, 2, 3, 8, 1, 7, 5 }
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#define IOMUX_TABLE_UART \
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{ IOMUXC_GPIO_AD_B0_12_LPUART1_TX }, { IOMUXC_GPIO_AD_B0_13_LPUART1_RX }, \
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{ IOMUXC_GPIO_AD_B1_02_LPUART2_TX }, { IOMUXC_GPIO_AD_B1_03_LPUART2_RX }, \
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{ IOMUXC_GPIO_AD_B1_06_LPUART3_TX }, { IOMUXC_GPIO_AD_B1_07_LPUART3_RX }, \
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{ IOMUXC_GPIO_B1_00_LPUART4_TX }, { IOMUXC_GPIO_B1_01_LPUART4_RX }, \
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{ IOMUXC_GPIO_B1_12_LPUART5_TX }, { IOMUXC_GPIO_B1_13_LPUART5_RX }, \
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{ IOMUXC_GPIO_AD_B0_02_LPUART6_TX }, { IOMUXC_GPIO_AD_B0_03_LPUART6_RX }, \
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{ IOMUXC_GPIO_EMC_31_LPUART7_TX }, { IOMUXC_GPIO_EMC_32_LPUART7_RX }, \
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{ IOMUXC_GPIO_AD_B1_10_LPUART8_TX }, { IOMUXC_GPIO_AD_B1_11_LPUART8_RX },
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465
ports/mimxrt/machine_uart.c
Normal file
465
ports/mimxrt/machine_uart.c
Normal file
@ -0,0 +1,465 @@
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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020-2021 Damien P. George
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* Copyright (c) 2021 Robert Hammelrath
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
|
||||
|
||||
#include "py/runtime.h"
|
||||
#include "py/stream.h"
|
||||
#include "py/mphal.h"
|
||||
#include "ticks.h"
|
||||
#include "fsl_common.h"
|
||||
#include "fsl_lpuart.h"
|
||||
#include "fsl_iomuxc.h"
|
||||
|
||||
#define DEFAULT_UART_BAUDRATE (115200)
|
||||
#define DEFAULT_BUFFER_SIZE (256)
|
||||
#define MIN_BUFFER_SIZE (32)
|
||||
#define MAX_BUFFER_SIZE (32766)
|
||||
|
||||
#define UART_INVERT_TX (1)
|
||||
#define UART_INVERT_RX (2)
|
||||
#define UART_INVERT_MASK (UART_INVERT_TX | UART_INVERT_RX)
|
||||
|
||||
typedef struct _machine_uart_obj_t {
|
||||
mp_obj_base_t base;
|
||||
struct _lpuart_handle handle;
|
||||
lpuart_config_t config;
|
||||
LPUART_Type *lpuart;
|
||||
uint16_t timeout; // timeout waiting for first char (in ms)
|
||||
uint16_t timeout_char; // timeout waiting between chars (in ms)
|
||||
uint8_t id;
|
||||
uint8_t invert;
|
||||
uint16_t tx_status;
|
||||
uint8_t *txbuf;
|
||||
uint16_t txbuf_len;
|
||||
bool new;
|
||||
} machine_uart_obj_t;
|
||||
|
||||
typedef struct _iomux_table_t {
|
||||
uint32_t muxRegister;
|
||||
uint32_t muxMode;
|
||||
uint32_t inputRegister;
|
||||
uint32_t inputDaisy;
|
||||
uint32_t configRegister;
|
||||
} iomux_table_t;
|
||||
|
||||
extern const mp_obj_type_t machine_uart_type;
|
||||
|
||||
STATIC const uint8_t uart_index_table[] = MICROPY_HW_UART_INDEX;
|
||||
STATIC LPUART_Type *uart_base_ptr_table[] = LPUART_BASE_PTRS;
|
||||
static const iomux_table_t iomux_table_uart[] = {
|
||||
IOMUX_TABLE_UART
|
||||
};
|
||||
|
||||
STATIC const char *_parity_name[] = {"None", "", "0", "1"}; // Is defined as 0, 2, 3
|
||||
STATIC const char *_invert_name[] = {"None", "INV_TX", "INV_RX", "INV_TX|INV_RX"};
|
||||
|
||||
#define RX (iomux_table_uart[index + 1])
|
||||
#define TX (iomux_table_uart[index])
|
||||
|
||||
bool lpuart_set_iomux(int8_t uart) {
|
||||
int index = (uart - 1) * 2;
|
||||
|
||||
if (TX.muxRegister != 0) {
|
||||
IOMUXC_SetPinMux(TX.muxRegister, TX.muxMode, TX.inputRegister, TX.inputDaisy, TX.configRegister, 0U);
|
||||
IOMUXC_SetPinConfig(TX.muxRegister, TX.muxMode, TX.inputRegister, TX.inputDaisy, TX.configRegister, 0x10B0u);
|
||||
|
||||
IOMUXC_SetPinMux(RX.muxRegister, RX.muxMode, RX.inputRegister, RX.inputDaisy, RX.configRegister, 0U);
|
||||
IOMUXC_SetPinConfig(RX.muxRegister, RX.muxMode, RX.inputRegister, RX.inputDaisy, RX.configRegister, 0x10B0u);
|
||||
return true;
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
uint32_t UART_SrcFreq(void) {
|
||||
uint32_t freq;
|
||||
// To make it simple, we assume default PLL and divider settings, and the
|
||||
// only variable from application is use PLL3 source or OSC source.
|
||||
if (CLOCK_GetMux(kCLOCK_UartMux) == 0) { // PLL3 div6 80M
|
||||
freq = (CLOCK_GetPllFreq(kCLOCK_PllUsb1) / 6U) / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U);
|
||||
} else {
|
||||
freq = CLOCK_GetOscFreq() / (CLOCK_GetDiv(kCLOCK_UartDiv) + 1U);
|
||||
}
|
||||
return freq;
|
||||
}
|
||||
|
||||
void LPUART_UserCallback(LPUART_Type *base, lpuart_handle_t *handle, status_t status, void *userData) {
|
||||
machine_uart_obj_t *self = userData;
|
||||
if (kStatus_LPUART_TxIdle == status) {
|
||||
self->tx_status = kStatus_LPUART_TxIdle;
|
||||
}
|
||||
|
||||
if (kStatus_LPUART_RxRingBufferOverrun == status) {
|
||||
; // Ringbuffer full, deassert RTS if flow control is enabled
|
||||
}
|
||||
}
|
||||
|
||||
STATIC void machine_uart_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
|
||||
machine_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
mp_printf(print, "UART(%u, baudrate=%u, bits=%u, parity=%s, stop=%u, "
|
||||
"rxbuf=%d, txbuf=%d, timeout=%u, timeout_char=%u, invert=%s)",
|
||||
self->id, self->config.baudRate_Bps, 8 - self->config.dataBitsCount,
|
||||
_parity_name[self->config.parityMode], self->config.stopBitCount + 1,
|
||||
self->handle.rxRingBufferSize, self->txbuf_len, self->timeout, self->timeout_char,
|
||||
_invert_name[self->invert]);
|
||||
}
|
||||
|
||||
STATIC mp_obj_t machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
|
||||
enum { ARG_baudrate, ARG_bits, ARG_parity, ARG_stop,
|
||||
ARG_timeout, ARG_timeout_char, ARG_invert, ARG_rxbuf, ARG_txbuf};
|
||||
static const mp_arg_t allowed_args[] = {
|
||||
{ MP_QSTR_baudrate, MP_ARG_INT, {.u_int = -1} },
|
||||
{ MP_QSTR_bits, MP_ARG_INT, {.u_int = -1} },
|
||||
{ MP_QSTR_parity, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_INT(-1)} },
|
||||
{ MP_QSTR_stop, MP_ARG_INT, {.u_int = -1} },
|
||||
{ MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
||||
{ MP_QSTR_timeout_char, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
||||
{ MP_QSTR_invert, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
||||
{ MP_QSTR_rxbuf, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
||||
{ MP_QSTR_txbuf, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
||||
};
|
||||
|
||||
// Parse args
|
||||
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
||||
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
||||
|
||||
// Set baudrate if configured.
|
||||
if (args[ARG_baudrate].u_int > 0) {
|
||||
self->config.baudRate_Bps = args[ARG_baudrate].u_int;
|
||||
}
|
||||
|
||||
// Set bits if configured.
|
||||
if (args[ARG_bits].u_int > 0) {
|
||||
self->config.dataBitsCount = 8 - args[ARG_bits].u_int;
|
||||
}
|
||||
|
||||
// Set parity if configured.
|
||||
if (args[ARG_parity].u_obj != MP_OBJ_NEW_SMALL_INT(-1)) {
|
||||
if (args[ARG_parity].u_obj == mp_const_none) {
|
||||
self->config.parityMode = kLPUART_ParityDisabled;
|
||||
} else if (mp_obj_get_int(args[ARG_parity].u_obj) & 1) {
|
||||
self->config.parityMode = kLPUART_ParityOdd;
|
||||
} else {
|
||||
self->config.parityMode = kLPUART_ParityEven;
|
||||
}
|
||||
}
|
||||
|
||||
// Set stop bits if configured.
|
||||
if (args[ARG_stop].u_int > 0) {
|
||||
self->config.stopBitCount = args[ARG_stop].u_int - 1;
|
||||
}
|
||||
|
||||
// Set timeout if configured.
|
||||
if (args[ARG_timeout].u_int >= 0) {
|
||||
self->timeout = args[ARG_timeout].u_int;
|
||||
}
|
||||
|
||||
// Set timeout_char if configured.
|
||||
if (args[ARG_timeout_char].u_int >= 0) {
|
||||
self->timeout_char = args[ARG_timeout_char].u_int;
|
||||
}
|
||||
|
||||
// Set line inversion if configured.
|
||||
if (args[ARG_invert].u_int >= 0) {
|
||||
if (args[ARG_invert].u_int & ~UART_INVERT_MASK) {
|
||||
mp_raise_ValueError(MP_ERROR_TEXT("bad inversion mask"));
|
||||
}
|
||||
self->invert = args[ARG_invert].u_int;
|
||||
}
|
||||
|
||||
self->tx_status = kStatus_LPUART_TxIdle;
|
||||
self->config.enableTx = true;
|
||||
self->config.enableRx = true;
|
||||
|
||||
// Set the RX buffer size if configured.
|
||||
size_t rxbuf_len = DEFAULT_BUFFER_SIZE;
|
||||
if (args[ARG_rxbuf].u_int > 0) {
|
||||
rxbuf_len = args[ARG_rxbuf].u_int;
|
||||
if (rxbuf_len < MIN_BUFFER_SIZE) {
|
||||
rxbuf_len = MIN_BUFFER_SIZE;
|
||||
} else if (rxbuf_len > MAX_BUFFER_SIZE) {
|
||||
mp_raise_ValueError(MP_ERROR_TEXT("rxbuf too large"));
|
||||
}
|
||||
}
|
||||
|
||||
// Set the TX buffer size if configured.
|
||||
size_t txbuf_len = DEFAULT_BUFFER_SIZE;
|
||||
if (args[ARG_txbuf].u_int > 0) {
|
||||
txbuf_len = args[ARG_txbuf].u_int;
|
||||
if (txbuf_len < MIN_BUFFER_SIZE) {
|
||||
txbuf_len = MIN_BUFFER_SIZE;
|
||||
} else if (txbuf_len > MAX_BUFFER_SIZE) {
|
||||
mp_raise_ValueError(MP_ERROR_TEXT("txbuf too large"));
|
||||
}
|
||||
}
|
||||
|
||||
// Initialise the UART peripheral if any arguments given, or it was not initialised previously.
|
||||
if (n_args > 1 || self->new) {
|
||||
self->new = false;
|
||||
// may be obsolete
|
||||
if (self->config.baudRate_Bps == 0) {
|
||||
self->config.baudRate_Bps = DEFAULT_UART_BAUDRATE;
|
||||
}
|
||||
|
||||
// Make sure timeout_char is at least as long as a whole character (13 bits to be safe).
|
||||
uint32_t min_timeout_char = 13000 / self->config.baudRate_Bps + 1;
|
||||
if (self->timeout_char < min_timeout_char) {
|
||||
self->timeout_char = min_timeout_char;
|
||||
}
|
||||
|
||||
LPUART_Init(self->lpuart, &self->config, UART_SrcFreq()); // ??
|
||||
LPUART_TransferCreateHandle(self->lpuart, &self->handle, LPUART_UserCallback, self);
|
||||
uint8_t *buffer = m_new(uint8_t, rxbuf_len + 1);
|
||||
LPUART_TransferStartRingBuffer(self->lpuart, &self->handle, buffer, rxbuf_len);
|
||||
self->txbuf = m_new(uint8_t, txbuf_len); // Allocate the TX buffer.
|
||||
self->txbuf_len = txbuf_len;
|
||||
|
||||
// The Uart supports inverting, but not the fsl API, so it has to coded directly
|
||||
// And it has to be done after LPUART_Init.
|
||||
if (self->invert & UART_INVERT_RX) {
|
||||
LPUART_EnableRx(self->lpuart, false);
|
||||
self->lpuart->STAT |= 1 << LPUART_STAT_RXINV_SHIFT;
|
||||
LPUART_EnableRx(self->lpuart, true);
|
||||
}
|
||||
if (self->invert & UART_INVERT_TX) {
|
||||
LPUART_EnableTx(self->lpuart, false);
|
||||
self->lpuart->CTRL |= 1 << LPUART_CTRL_TXINV_SHIFT;
|
||||
LPUART_EnableTx(self->lpuart, true);
|
||||
}
|
||||
// Send long break; drop that code for a shorter break duration
|
||||
LPUART_EnableTx(self->lpuart, false);
|
||||
self->lpuart->STAT |= 1 << LPUART_STAT_BRK13_SHIFT;
|
||||
LPUART_EnableTx(self->lpuart, true);
|
||||
|
||||
// Allocate the TX ring buffer. Not used yet, but maybe later.
|
||||
|
||||
// ringbuf_alloc(&(self->write_buffer), txbuf_len + 1);
|
||||
// MP_STATE_PORT(rp2_uart_tx_buffer[uart_id]) = self->write_buffer.buf;
|
||||
|
||||
}
|
||||
|
||||
return MP_OBJ_FROM_PTR(self);
|
||||
}
|
||||
|
||||
STATIC mp_obj_t machine_uart_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
|
||||
mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
|
||||
|
||||
// Get UART bus.
|
||||
int uart_id = mp_obj_get_int(args[0]);
|
||||
if (uart_id < 1 || uart_id > MICROPY_HW_UART_NUM) {
|
||||
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("UART(%d) doesn't exist"), uart_id);
|
||||
}
|
||||
|
||||
// Create the UART object and fill it with defaults.
|
||||
uint8_t uart_hw_id = uart_index_table[uart_id]; // the hw uart number 1..n
|
||||
machine_uart_obj_t *self = m_new_obj(machine_uart_obj_t);
|
||||
self->base.type = &machine_uart_type;
|
||||
self->id = uart_id;
|
||||
self->lpuart = uart_base_ptr_table[uart_hw_id];
|
||||
self->invert = false;
|
||||
self->timeout = 1;
|
||||
self->timeout_char = 1;
|
||||
self->new = true;
|
||||
LPUART_GetDefaultConfig(&self->config);
|
||||
|
||||
// Configure board-specific pin MUX based on the hardware device number.
|
||||
lpuart_set_iomux(uart_hw_id);
|
||||
|
||||
mp_map_t kw_args;
|
||||
mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
|
||||
return machine_uart_init_helper(self, n_args - 1, args + 1, &kw_args);
|
||||
}
|
||||
|
||||
// uart.init(baud, [kwargs])
|
||||
STATIC mp_obj_t machine_uart_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
|
||||
return machine_uart_init_helper(args[0], n_args - 1, args + 1, kw_args);
|
||||
}
|
||||
MP_DEFINE_CONST_FUN_OBJ_KW(machine_uart_init_obj, 1, machine_uart_init);
|
||||
|
||||
STATIC mp_obj_t machine_uart_any(mp_obj_t self_in) {
|
||||
machine_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
size_t count = LPUART_TransferGetRxRingBufferLength(self->lpuart, &self->handle);
|
||||
return MP_OBJ_NEW_SMALL_INT(count);
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_uart_any_obj, machine_uart_any);
|
||||
|
||||
STATIC mp_obj_t machine_uart_sendbreak(mp_obj_t self_in) {
|
||||
machine_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
self->lpuart->CTRL |= 1 << LPUART_CTRL_SBK_SHIFT; // Set SBK bit
|
||||
self->lpuart->CTRL &= ~LPUART_CTRL_SBK_MASK; // Clear SBK bit
|
||||
return mp_const_none;
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_uart_sendbreak_obj, machine_uart_sendbreak);
|
||||
|
||||
STATIC const mp_rom_map_elem_t machine_uart_locals_dict_table[] = {
|
||||
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_uart_init_obj) },
|
||||
|
||||
{ MP_ROM_QSTR(MP_QSTR_any), MP_ROM_PTR(&machine_uart_any_obj) },
|
||||
|
||||
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
|
||||
|
||||
{ MP_ROM_QSTR(MP_QSTR_sendbreak), MP_ROM_PTR(&machine_uart_sendbreak_obj) },
|
||||
|
||||
{ MP_ROM_QSTR(MP_QSTR_INV_TX), MP_ROM_INT(UART_INVERT_TX) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_INV_RX), MP_ROM_INT(UART_INVERT_RX) },
|
||||
|
||||
};
|
||||
STATIC MP_DEFINE_CONST_DICT(machine_uart_locals_dict, machine_uart_locals_dict_table);
|
||||
|
||||
STATIC mp_uint_t machine_uart_read(mp_obj_t self_in, void *buf_in, mp_uint_t size, int *errcode) {
|
||||
machine_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
uint64_t t = ticks_us64() + (uint64_t)self->timeout * 1000;
|
||||
uint64_t timeout_char_us = (uint64_t)self->timeout_char * 1000;
|
||||
lpuart_transfer_t xfer;
|
||||
uint8_t *dest = buf_in;
|
||||
size_t avail;
|
||||
size_t nget;
|
||||
|
||||
for (size_t received = 0; received < size;) {
|
||||
// Wait for the first/next character.
|
||||
while ((avail = LPUART_TransferGetRxRingBufferLength(self->lpuart, &self->handle)) <= 0) {
|
||||
if (ticks_us64() > t) { // timed out
|
||||
if (received <= 0) {
|
||||
*errcode = MP_EAGAIN;
|
||||
return MP_STREAM_ERROR;
|
||||
} else {
|
||||
return received;
|
||||
}
|
||||
}
|
||||
MICROPY_EVENT_POLL_HOOK
|
||||
}
|
||||
// Get as many bytes as possible to meet the need.
|
||||
nget = avail < (size - received) ? avail : size - received;
|
||||
xfer.data = dest + received;
|
||||
xfer.dataSize = nget;
|
||||
LPUART_TransferReceiveNonBlocking(self->lpuart, &self->handle, &xfer, NULL);
|
||||
received += nget;
|
||||
t = ticks_us64() + timeout_char_us;
|
||||
}
|
||||
return size;
|
||||
}
|
||||
|
||||
STATIC mp_uint_t machine_uart_write(mp_obj_t self_in, const void *buf_in, mp_uint_t size, int *errcode) {
|
||||
machine_uart_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
lpuart_transfer_t xfer;
|
||||
uint64_t t;
|
||||
size_t remaining = size;
|
||||
size_t offset = 0;
|
||||
uint8_t fifo_size = FSL_FEATURE_LPUART_FIFO_SIZEn(0);
|
||||
|
||||
// First check if a previous transfer is still ongoing,
|
||||
// then wait at least the number of remaining character times.
|
||||
t = ticks_us64() + (uint64_t)(self->handle.txDataSize + fifo_size) * (13000000 / self->config.baudRate_Bps + 1000);
|
||||
while (self->tx_status != kStatus_LPUART_TxIdle) {
|
||||
if (ticks_us64() > t) { // timed out, hard error
|
||||
*errcode = MP_ETIMEDOUT;
|
||||
return MP_STREAM_ERROR;
|
||||
}
|
||||
MICROPY_EVENT_POLL_HOOK
|
||||
}
|
||||
|
||||
// Check if the first part has to be sent semi-blocking.
|
||||
if (size > self->txbuf_len) {
|
||||
// Send the first block.
|
||||
xfer.data = (uint8_t *)buf_in;
|
||||
offset = xfer.dataSize = size - self->txbuf_len;
|
||||
self->tx_status = kStatus_LPUART_TxBusy;
|
||||
LPUART_TransferSendNonBlocking(self->lpuart, &self->handle, &xfer);
|
||||
|
||||
// Wait at least the number of character times for this chunk.
|
||||
t = ticks_us64() + (uint64_t)xfer.dataSize * (13000000 / self->config.baudRate_Bps + 1000);
|
||||
while (self->handle.txDataSize) {
|
||||
// Wait for the first/next character to be sent.
|
||||
if (ticks_us64() > t) { // timed out
|
||||
if (self->handle.txDataSize >= size) {
|
||||
*errcode = MP_ETIMEDOUT;
|
||||
return MP_STREAM_ERROR;
|
||||
} else {
|
||||
return size - self->handle.txDataSize;
|
||||
}
|
||||
}
|
||||
MICROPY_EVENT_POLL_HOOK
|
||||
}
|
||||
remaining = self->txbuf_len;
|
||||
} else {
|
||||
// The data fits into the tx buffer.
|
||||
offset = 0;
|
||||
remaining = size;
|
||||
}
|
||||
|
||||
// Send the remaining data without waiting for completion.
|
||||
memcpy(self->txbuf, (uint8_t *)buf_in + offset, remaining);
|
||||
xfer.data = self->txbuf;
|
||||
xfer.dataSize = remaining;
|
||||
self->tx_status = kStatus_LPUART_TxBusy;
|
||||
LPUART_TransferSendNonBlocking(self->lpuart, &self->handle, &xfer);
|
||||
|
||||
return size;
|
||||
}
|
||||
|
||||
STATIC mp_uint_t machine_uart_ioctl(mp_obj_t self_in, mp_uint_t request, mp_uint_t arg, int *errcode) {
|
||||
machine_uart_obj_t *self = self_in;
|
||||
mp_uint_t ret;
|
||||
if (request == MP_STREAM_POLL) {
|
||||
uintptr_t flags = arg;
|
||||
ret = 0;
|
||||
if (flags & MP_STREAM_POLL_RD) {
|
||||
uint32_t count;
|
||||
count = LPUART_TransferGetRxRingBufferLength(self->lpuart, &self->handle);
|
||||
if (count > 0) {
|
||||
ret |= MP_STREAM_POLL_RD;
|
||||
}
|
||||
}
|
||||
if ((flags & MP_STREAM_POLL_WR)) {
|
||||
ret |= MP_STREAM_POLL_WR;
|
||||
}
|
||||
} else {
|
||||
*errcode = MP_EINVAL;
|
||||
ret = MP_STREAM_ERROR;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
STATIC const mp_stream_p_t uart_stream_p = {
|
||||
.read = machine_uart_read,
|
||||
.write = machine_uart_write,
|
||||
.ioctl = machine_uart_ioctl,
|
||||
.is_text = false,
|
||||
};
|
||||
|
||||
const mp_obj_type_t machine_uart_type = {
|
||||
{ &mp_type_type },
|
||||
.name = MP_QSTR_UART,
|
||||
.print = machine_uart_print,
|
||||
.make_new = machine_uart_make_new,
|
||||
.getiter = mp_identity_getiter,
|
||||
.iternext = mp_stream_unbuffered_iter,
|
||||
.protocol = &uart_stream_p,
|
||||
.locals_dict = (mp_obj_dict_t *)&machine_uart_locals_dict,
|
||||
};
|
||||
@ -65,6 +65,7 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
|
||||
{ MP_ROM_QSTR(MP_QSTR_Signal), MP_ROM_PTR(&machine_signal_type) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_SoftI2C), MP_ROM_PTR(&mp_machine_soft_i2c_type) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_SoftSPI), MP_ROM_PTR(&mp_machine_soft_spi_type) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&machine_uart_type) },
|
||||
};
|
||||
STATIC MP_DEFINE_CONST_DICT(machine_module_globals, machine_module_globals_table);
|
||||
|
||||
|
||||
@ -32,6 +32,7 @@
|
||||
extern const mp_obj_type_t machine_adc_type;
|
||||
extern const mp_obj_type_t machine_timer_type;
|
||||
extern const mp_obj_type_t machine_rtc_type;
|
||||
extern const mp_obj_type_t machine_uart_type;
|
||||
|
||||
void machine_adc_init(void);
|
||||
void machine_timer_init_PIT(void);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user