71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
#include <string.h>
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#include "cmsis_os2.h"
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#include "user_epd_impl.h"
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#define BUSY_MAX_POLLING_TIME 30000 // 30s
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uint8_t g_epd_busy_irq_flag = 0;
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extern osSemaphoreId_t g_epd_busy_semphr;
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depg0213_ret_t _epd_reset_cb(void *handle) {
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SPI_HandleTypeDef *hspi = handle;
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if (hspi->Instance == SPI2) {
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HAL_GPIO_WritePin(SPI2_RES_GPIO_Port, SPI2_RES_Pin, GPIO_PIN_RESET);
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HAL_Delay(5);
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HAL_GPIO_WritePin(SPI2_RES_GPIO_Port, SPI2_RES_Pin, GPIO_PIN_SET);
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}
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return DEPG0213_OK;
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}
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depg0213_ret_t _epd_poll_busy(void *handle) {
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SPI_HandleTypeDef *hspi = handle;
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if (hspi->Instance == SPI2) {
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if (osKernelGetState() != osKernelRunning) { // Kernel has not started, use flag polling instead.
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uint32_t tick_start = HAL_GetTick();
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while (!g_epd_busy_irq_flag) {
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if (HAL_GetTick() - tick_start > BUSY_MAX_POLLING_TIME) {
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return DEPG0213_ERROR;
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}
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}
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g_epd_busy_irq_flag = 0;
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} else { // Kernel has started, use semaphore.
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if(osSemaphoreAcquire(g_epd_busy_semphr, BUSY_MAX_POLLING_TIME) != osOK) {
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return DEPG0213_ERROR;
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}
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}
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}
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return DEPG0213_OK;
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}
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depg0213_ret_t _epd_write_cmd_cb(void *handle, uint8_t *cmd, uint8_t len) {
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SPI_HandleTypeDef *hspi = handle;
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HAL_StatusTypeDef ret = HAL_OK;
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if (hspi->Instance == SPI2) {
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HAL_GPIO_WritePin(SPI2_DC_GPIO_Port, SPI2_DC_Pin, GPIO_PIN_RESET);
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ret = HAL_SPI_Transmit(hspi, cmd, 0x01, 1000);
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if (len > 1) {
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HAL_GPIO_WritePin(SPI2_DC_GPIO_Port, SPI2_DC_Pin, GPIO_PIN_SET);
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ret = HAL_SPI_Transmit(hspi, &cmd[1], len - 1, 1000);
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}
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}
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if (ret != HAL_OK) return DEPG0213_ERROR;
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return DEPG0213_OK;
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}
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depg0213_ret_t _epd_write_data_cb(void *handle, uint8_t *data, uint16_t len) {
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SPI_HandleTypeDef *hspi = handle;
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HAL_StatusTypeDef ret = HAL_OK;
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if (hspi->Instance == SPI2) {
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HAL_GPIO_WritePin(SPI2_DC_GPIO_Port, SPI2_DC_Pin, GPIO_PIN_SET);
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ret = HAL_SPI_Transmit(hspi, data, len, 1000);
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}
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if (ret != HAL_OK) return DEPG0213_ERROR;
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return DEPG0213_OK;
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} |