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spi: added an API to get max transaction length and use in spi lcd driver

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Armando 2023-04-24 14:21:13 +08:00 committed by Armando (Dou Yiwen)
parent 4e67ea0fe3
commit 61ecbb44a5
3 changed files with 36 additions and 2 deletions
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12
components/driver/include/driver/spi_master.h
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@ -384,6 +384,18 @@ void spi_get_timing(bool gpio_is_used, int input_delay_ns, int eff_clk, int *dum
*/
int spi_get_freq_limit(bool gpio_is_used, int input_delay_ns);
/**
* @brief Get max length (in bytes) of one transaction
*
* @param host_id SPI peripheral
* @param[out] max_bytes Max length of one transaction, in bytes
*
* @return
* - ESP_OK: On success
* - ESP_ERR_INVALID_ARG: Invalid argument
*/
esp_err_t spi_bus_get_max_transaction_len(spi_host_device_t host_id, size_t *max_bytes);
#ifdef __cplusplus
}
#endif

18
components/driver/spi_master.c
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@ -111,6 +111,7 @@ We have two bits to control the interrupt:
*/
#include <string.h>
#include <sys/param.h>
#include "driver/spi_common_internal.h"
#include "driver/spi_master.h"
@ -1022,3 +1023,20 @@ esp_err_t SPI_MASTER_ISR_ATTR spi_device_polling_transmit(spi_device_handle_t ha
return spi_device_polling_end(handle, portMAX_DELAY);
}
esp_err_t spi_bus_get_max_transaction_len(spi_host_device_t host_id, size_t *max_bytes)
{
SPI_CHECK(is_valid_host(host_id), "invalid host", ESP_ERR_INVALID_ARG);
if (bus_driver_ctx[host_id] == NULL || max_bytes == NULL) {
return ESP_ERR_INVALID_ARG;
}
spi_host_t *host = bus_driver_ctx[host_id];
if (host->bus_attr->dma_enabled) {
*max_bytes = MIN(host->bus_attr->max_transfer_sz, (SPI_LL_DMA_MAX_BIT_LEN / 8));
} else {
*max_bytes = MIN(host->bus_attr->max_transfer_sz, (SPI_LL_CPU_MAX_BIT_LEN / 8));
}
return ESP_OK;
}

8
components/esp_lcd/src/esp_lcd_panel_io_spi.c
View File

@ -102,9 +102,13 @@ esp_err_t esp_lcd_new_panel_io_spi(esp_lcd_spi_bus_handle_t bus, const esp_lcd_p
spi_panel_io->base.tx_color = panel_io_spi_tx_color;
spi_panel_io->base.del = panel_io_spi_del;
spi_panel_io->base.register_event_callbacks = panel_io_spi_register_event_callbacks;
spi_panel_io->spi_trans_max_bytes = spi_bus_get_attr((spi_host_device_t)bus)->max_transfer_sz;
size_t max_trans_bytes = 0;
ESP_GOTO_ON_ERROR(spi_bus_get_max_transaction_len((spi_host_device_t)bus, &max_trans_bytes), err, TAG, "get spi max transaction len failed");
spi_panel_io->spi_trans_max_bytes = max_trans_bytes;
*ret_io = &(spi_panel_io->base);
ESP_LOGD(TAG, "new spi lcd panel io @%p", spi_panel_io);
ESP_LOGD(TAG, "new spi lcd panel io @%p, max_trans_bytes: %d", spi_panel_io, (int)max_trans_bytes);
return ESP_OK;