def719e7a7
There were several different spellings of MicroPython present in comments,
when there should be only one.
Aligning to upstream commit 55f33240f3.
128 lines
4.8 KiB
C
128 lines
4.8 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2016 Glenn Ruben Bakke
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
|
|
#include "mphalport.h"
|
|
#include "hal_spi.h"
|
|
|
|
#ifdef HAL_SPI_MODULE_ENABLED
|
|
|
|
static const uint32_t hal_spi_frequency_lookup[] = {
|
|
SPI_FREQUENCY_FREQUENCY_K125, // 125 kbps
|
|
SPI_FREQUENCY_FREQUENCY_K250, // 250 kbps
|
|
SPI_FREQUENCY_FREQUENCY_K500, // 500 kbps
|
|
SPI_FREQUENCY_FREQUENCY_M1, // 1 Mbps
|
|
SPI_FREQUENCY_FREQUENCY_M2, // 2 Mbps
|
|
SPI_FREQUENCY_FREQUENCY_M4, // 4 Mbps
|
|
SPI_FREQUENCY_FREQUENCY_M8 // 8 Mbps
|
|
};
|
|
|
|
void hal_spi_master_init(NRF_SPI_Type * p_instance, hal_spi_init_t const * p_spi_init) {
|
|
hal_gpio_cfg_pin(p_spi_init->clk_pin->port, p_spi_init->clk_pin->pin, HAL_GPIO_MODE_OUTPUT, HAL_GPIO_PULL_DISABLED);
|
|
hal_gpio_cfg_pin(p_spi_init->mosi_pin->port, p_spi_init->mosi_pin->pin, HAL_GPIO_MODE_OUTPUT, HAL_GPIO_PULL_DISABLED);
|
|
hal_gpio_cfg_pin(p_spi_init->miso_pin->port, p_spi_init->miso_pin->pin, HAL_GPIO_MODE_INPUT, HAL_GPIO_PULL_DISABLED);
|
|
|
|
#if NRF51
|
|
p_instance->PSELSCK = p_spi_init->clk_pin->pin;
|
|
p_instance->PSELMOSI = p_spi_init->mosi_pin->pin;
|
|
p_instance->PSELMISO = p_spi_init->miso_pin->pin;
|
|
#else
|
|
p_instance->PSEL.SCK = p_spi_init->clk_pin->pin;
|
|
p_instance->PSEL.MOSI = p_spi_init->mosi_pin->pin;
|
|
p_instance->PSEL.MISO = p_spi_init->miso_pin->pin;
|
|
|
|
#if NRF52840_XXAA
|
|
p_instance->PSEL.SCK |= (p_spi_init->clk_pin->port << SPI_PSEL_SCK_PORT_Pos);
|
|
p_instance->PSEL.MOSI |= (p_spi_init->mosi_pin->port << SPI_PSEL_MOSI_PORT_Pos);
|
|
p_instance->PSEL.MISO |= (p_spi_init->miso_pin->port << SPI_PSEL_MISO_PORT_Pos);
|
|
#endif
|
|
|
|
#endif
|
|
|
|
p_instance->FREQUENCY = hal_spi_frequency_lookup[p_spi_init->freq];
|
|
|
|
uint32_t mode;
|
|
switch (p_spi_init->mode) {
|
|
case HAL_SPI_MODE_CPOL0_CPHA0:
|
|
mode = (SPI_CONFIG_CPHA_Leading << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveHigh << SPI_CONFIG_CPOL_Pos);
|
|
break;
|
|
case HAL_SPI_MODE_CPOL0_CPHA1:
|
|
mode = (SPI_CONFIG_CPHA_Trailing << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveHigh << SPI_CONFIG_CPOL_Pos);
|
|
break;
|
|
case HAL_SPI_MODE_CPOL1_CPHA0:
|
|
mode = (SPI_CONFIG_CPHA_Leading << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveLow << SPI_CONFIG_CPOL_Pos);
|
|
break;
|
|
case HAL_SPI_MODE_CPOL1_CPHA1:
|
|
mode = (SPI_CONFIG_CPHA_Trailing << SPI_CONFIG_CPHA_Pos) | (SPI_CONFIG_CPOL_ActiveLow << SPI_CONFIG_CPOL_Pos);
|
|
break;
|
|
default:
|
|
mode = 0;
|
|
break;
|
|
}
|
|
|
|
if (p_spi_init->firstbit == HAL_SPI_LSB_FIRST) {
|
|
p_instance->CONFIG = (mode | (SPI_CONFIG_ORDER_LsbFirst << SPI_CONFIG_ORDER_Pos));
|
|
} else {
|
|
p_instance->CONFIG = (mode | (SPI_CONFIG_ORDER_MsbFirst << SPI_CONFIG_ORDER_Pos));
|
|
}
|
|
|
|
p_instance->EVENTS_READY = 0U;
|
|
p_instance->ENABLE = (SPI_ENABLE_ENABLE_Enabled << SPI_ENABLE_ENABLE_Pos);
|
|
}
|
|
|
|
void hal_spi_master_tx_rx(NRF_SPI_Type * p_instance,
|
|
uint16_t transfer_size,
|
|
const uint8_t * tx_data,
|
|
uint8_t * rx_data) {
|
|
|
|
uint16_t number_of_txd_bytes = 0;
|
|
|
|
p_instance->EVENTS_READY = 0;
|
|
|
|
while (number_of_txd_bytes < transfer_size) {
|
|
p_instance->TXD = (uint32_t)(tx_data[number_of_txd_bytes]);
|
|
|
|
// wait for the transaction complete or timeout (about 10ms - 20 ms)
|
|
while (p_instance->EVENTS_READY == 0) {
|
|
;
|
|
}
|
|
|
|
p_instance->EVENTS_READY = 0;
|
|
|
|
uint8_t in_byte = (uint8_t)p_instance->RXD;
|
|
|
|
if (rx_data != NULL) {
|
|
rx_data[number_of_txd_bytes] = in_byte;
|
|
}
|
|
|
|
number_of_txd_bytes++;
|
|
};
|
|
}
|
|
|
|
#endif // HAL_SPI_MODULE_ENABLED
|