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Merge pull request #4412 from kamtom480/spi_and_i2c

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spresense: minor changes for i2c, spi and uart
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Scott Shawcroft 2021-03-15 17:35:06 -07:00 committed by GitHub
commit 9cb8ce67ed
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3 changed files with 16 additions and 0 deletions
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2
ports/cxd56/common-hal/busio/I2C.c
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@ -27,6 +27,7 @@
#include <arch/chip/pin.h>
#include <nuttx/i2c/i2c_master.h>
#include <cxd56_i2c.h>
#include <cxd56_pinconfig.h>
#include "py/runtime.h"
@ -49,6 +50,7 @@ void common_hal_busio_i2c_construct(busio_i2c_obj_t *self, const mcu_pin_obj_t *
self->sda_pin = sda;
self->frequency = frequency;
self->i2c_dev = cxd56_i2cbus_initialize(0);
CXD56_PIN_CONFIGS(PINCONFS_I2C0);
}
void common_hal_busio_i2c_deinit(busio_i2c_obj_t *self) {

3
ports/cxd56/common-hal/busio/SPI.c
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@ -26,6 +26,7 @@
#include <arch/chip/pin.h>
#include <cxd56_spi.h>
#include <cxd56_pinconfig.h>
#include "py/runtime.h"
@ -39,10 +40,12 @@ void common_hal_busio_spi_construct(busio_spi_obj_t *self, const mcu_pin_obj_t *
(mosi == NULL || mosi->number == PIN_SPI4_MOSI) &&
(miso == NULL || miso->number == PIN_SPI4_MISO)) {
port = 4;
CXD56_PIN_CONFIGS(PINCONFS_SPI4);
} else if (clock->number == PIN_EMMC_CLK &&
(mosi == NULL || mosi->number == PIN_EMMC_DATA0) &&
(miso == NULL || miso->number == PIN_EMMC_DATA1)) {
port = 5;
CXD56_PIN_CONFIGS(PINCONFS_EMMCA_SPI5);
}
if (port < 0) {

11
ports/cxd56/common-hal/busio/UART.c
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@ -59,6 +59,9 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
uint32_t baudrate, uint8_t bits, busio_uart_parity_t parity, uint8_t stop,
mp_float_t timeout, uint16_t receiver_buffer_size, byte *receiver_buffer,
bool sigint_enabled) {
int i;
int count;
char tmp;
struct termios tio;
if ((rts != NULL) || (cts != NULL) || (rs485_dir != NULL) || (rs485_invert)) {
@ -96,6 +99,14 @@ void common_hal_busio_uart_construct(busio_uart_obj_t *self,
if (busio_uart_dev[self->number].fd < 0) {
mp_raise_ValueError(translate("Could not initialize UART"));
}
// Wait to make sure the UART is ready
usleep(1000);
// Clear RX FIFO
ioctl(busio_uart_dev[self->number].fd, FIONREAD, (long unsigned int)&count);
for (i = 0; i < count; i++) {
read(busio_uart_dev[self->number].fd, &tmp, 1);
}
}
ioctl(busio_uart_dev[self->number].fd, TCGETS, (long unsigned int)&tio);