Roy_01
cfe55c5e23
1. do nothing when i2c transfer completed 2. take away virtual_data 3. spi frequency change to 8M
150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
#include "nrf_drv_twi.h"
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#include "nrf_gpio.h"
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#include "nrf_log.h"
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#include "FreeRTOS.h"
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#include "queue.h"
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#include "semphr.h"
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#include "task.h"
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#define I2C_SDA NRF_GPIO_PIN_MAP(0, 11)
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#define I2C_SCL NRF_GPIO_PIN_MAP(0, 22)
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static const nrf_drv_twi_t twi0 = NRF_DRV_TWI_INSTANCE(0);
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static SemaphoreHandle_t i2c_sem = NULL;
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static SemaphoreHandle_t i2c_mutex = NULL;
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static QueueHandle_t i2c_evt_queue = NULL;
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void nrf_drv_twi_evt_handler(nrf_drv_twi_evt_t const *p_event, void *p_context)
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{
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BaseType_t xHigherPriorityTaskWoken = pdFALSE;
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xQueueSendFromISR(i2c_evt_queue, p_event, &xHigherPriorityTaskWoken);
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portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
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}
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void twi0_init(void)
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{
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ret_code_t err_code;
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i2c_sem = xSemaphoreCreateBinary();
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i2c_mutex = xSemaphoreCreateMutex();
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i2c_evt_queue = xQueueCreate(2, sizeof(nrf_drv_twi_evt_t));
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const nrf_drv_twi_config_t twi0_config = {
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.scl = I2C_SCL,
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.sda = I2C_SDA,
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.frequency = NRF_DRV_TWI_FREQ_100K,
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.interrupt_priority = APP_IRQ_PRIORITY_HIGH,
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.clear_bus_init = true
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};
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err_code = nrf_drv_twi_init(&twi0, &twi0_config, nrf_drv_twi_evt_handler, NULL);
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APP_ERROR_CHECK(err_code);
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nrf_drv_twi_enable(&twi0);
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}
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void twi0_write_reg(uint8_t slave_addr, uint8_t reg_addr, uint8_t *data, uint8_t data_len)
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{
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xSemaphoreTake(i2c_mutex, portMAX_DELAY);
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static uint8_t i2c_buf[255];
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static nrf_drv_twi_evt_t evt;
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ret_code_t err_code;
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memcpy(i2c_buf, ®_addr, sizeof(reg_addr));
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memcpy(i2c_buf + sizeof(reg_addr), data, data_len);
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err_code = nrf_drv_twi_tx(&twi0, slave_addr, i2c_buf, data_len + 1, false);
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APP_ERROR_CHECK(err_code);
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xQueueReceive(i2c_evt_queue, &evt, portMAX_DELAY);
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switch (evt.type)
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{
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/* Transfer completed event. */
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case NRF_DRV_TWI_EVT_DONE:
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// TODO...
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break;
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/* Error event: NACK received after sending the address. */
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case NRF_DRV_TWI_EVT_ADDRESS_NACK:
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// TODO...
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__BKPT(255);
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break;
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/* Error event: NACK received after sending a data byte. */
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case NRF_DRV_TWI_EVT_DATA_NACK:
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// TODO...
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__BKPT(255);
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break;
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default:
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__BKPT(255);
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break;
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}
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xSemaphoreGive(i2c_mutex);
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NRF_LOG_INFO("i2c(W): slave_addr=0x%02x", slave_addr);
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NRF_LOG_HEXDUMP_INFO(i2c_buf, data_len + 1);
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}
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void twi0_read_reg(uint8_t slave_addr, uint8_t reg_addr, uint8_t *p_rx_buf, uint8_t rx_buffer_length)
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{
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xSemaphoreTake(i2c_mutex, portMAX_DELAY);
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nrf_drv_twi_evt_t evt;
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ret_code_t err_code;
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err_code = nrf_drv_twi_tx(&twi0, slave_addr, ®_addr, sizeof(reg_addr), false);
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APP_ERROR_CHECK(err_code);
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xQueueReceive(i2c_evt_queue, &evt, portMAX_DELAY);
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switch (evt.type)
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{
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/* Transfer completed event. */
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case NRF_DRV_TWI_EVT_DONE:
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// TODO...
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break;
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/* Error event: NACK received after sending the address. */
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case NRF_DRV_TWI_EVT_ADDRESS_NACK:
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// TODO...
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__BKPT(255);
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break;
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/* Error event: NACK received after sending a data byte. */
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case NRF_DRV_TWI_EVT_DATA_NACK:
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// TODO...
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__BKPT(255);
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break;
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default:
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break;
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}
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err_code = nrf_drv_twi_rx(&twi0, slave_addr, p_rx_buf, rx_buffer_length);
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APP_ERROR_CHECK(err_code);
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xQueueReceive(i2c_evt_queue, &evt, portMAX_DELAY);
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switch (evt.type)
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{
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/* Transfer completed event. */
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case NRF_DRV_TWI_EVT_DONE:
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// TODO...
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break;
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/* Error event: NACK received after sending the address. */
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case NRF_DRV_TWI_EVT_ADDRESS_NACK:
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// TODO...
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__BKPT(255);
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break;
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/* Error event: NACK received after sending a data byte. */
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case NRF_DRV_TWI_EVT_DATA_NACK:
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// TODO...
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__BKPT(255);
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break;
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default:
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break;
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}
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xSemaphoreGive(i2c_mutex);
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NRF_LOG_INFO("i2c(R): slave_addr=0x%02x reg_addr=0x%02x", slave_addr, reg_addr);
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NRF_LOG_HEXDUMP_INFO(p_rx_buf, rx_buffer_length);
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}
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