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Updated LCD driver, added maximum SPI transfer size.

This commit is contained in:
imi415 2021-03-18 00:40:39 +08:00
parent 6bcc64d337
commit 4a788dcac1
Signed by: imi415
GPG Key ID: 17F01E106F9F5E0A
4 changed files with 28 additions and 9 deletions
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2
include/drivers/user_spi_driver.h
View File

@ -10,6 +10,8 @@ typedef struct {
uint32_t speed_hz;
} user_spi_driver_t;
#define SPIDEV_MAX_TRANSFER_SIZE 4096
user_spi_ret_t user_spi_driver_init(user_spi_driver_t *spi, char *path, uint32_t speed_hz);
user_spi_ret_t user_spi_driver_deinit(user_spi_driver_t *spi);
user_spi_ret_t user_spi_driver_xfer(user_spi_driver_t *spi, uint8_t *tx_buf,

1
lib/CMakeLists.txt
View File

@ -17,3 +17,4 @@ set(ST7789_LCD_SOURCES
)
add_library(st7789 STATIC ${ST7789_LCD_SOURCES})
target_compile_definitions(st7789 PRIVATE "ST7789_PANEL_ZJY_240")

2
lib/st7789_lcd

@ -1 +1 @@
Subproject commit c685c2a4a80e047a495c2061d673f1fd191a8edd
Subproject commit 2d90485d678d1cf803135df522cd9b35acd3d013

32
src/drivers/user_spi_driver.c
View File

@ -2,17 +2,18 @@
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <linux/types.h>
#include <linux/spi/spidev.h>
#include <linux/types.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include "drivers/user_config_driver.h"
#include "utils/user_log_util.h"
#include "drivers/user_spi_driver.h"
user_spi_ret_t user_spi_driver_init(user_spi_driver_t *spi, char *path, uint32_t speed_hz) {
user_spi_ret_t user_spi_driver_init(user_spi_driver_t *spi, char *path,
uint32_t speed_hz) {
USER_LOG(USER_LOG_INFO, "SPI driver init.");
spi->spidev_fd = open(path, O_RDWR);
@ -41,11 +42,26 @@ user_spi_ret_t user_spi_driver_xfer(user_spi_driver_t *spi, uint8_t *tx_buf,
.len = len,
.cs_change = 0,
.speed_hz = spi->speed_hz,
.bits_per_word = 8
.bits_per_word = 8,
};
if(ioctl(spi->spidev_fd, SPI_IOC_MESSAGE(1), &txn) < 0) {
USER_LOG(USER_LOG_ERROR, "SPI transaction error.");
return USER_SPI_ERROR;
while(len > SPIDEV_MAX_TRANSFER_SIZE) {
txn.len = SPIDEV_MAX_TRANSFER_SIZE;
len -= SPIDEV_MAX_TRANSFER_SIZE;
if(ioctl(spi->spidev_fd, SPI_IOC_MESSAGE(1), &txn) < 0) {
USER_LOG(USER_LOG_ERROR, "SPI transaction error.");
return USER_SPI_ERROR;
}
}
if(len > 0) {
txn.len = len;
if(ioctl(spi->spidev_fd, SPI_IOC_MESSAGE(1), &txn) < 0) {
USER_LOG(USER_LOG_ERROR, "SPI transaction error.");
return USER_SPI_ERROR;
}
}
return USER_SPI_OK;