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MIPI-DSI完整的使用示例如下所示:
#include "hdf.h"
#include "mipi_dsi_if.h"
void PalMipiDsiTestSample(void)
{
uint8_t chnId;
int32_t ret;
DevHandle handle = NULL;
/* 设备通道编号 */
chnId = 0;
/* 获取操作句柄 */
handle = MipiDsiOpen(chnId);
if (handle == NULL) {
HDF_LOGE("MipiDsiOpen: failed!\n");
return;
}
/* 配置相应参数 */
struct MipiCfg cfg = {0};
cfg.lane = DSI_4_LANES;
cfg.mode = DSI_CMD_MODE;
cfg.burstMode = VIDEO_NON_BURST_MODE_SYNC_EVENTS;
cfg.format = FORMAT_RGB_24_BIT;
cfg.pixelClk = 174;
cfg.phyDataRate = 384;
cfg.timingInfo.hsaPixels = 50;
cfg.timingInfo.hbpPixels = 55;
cfg.timingInfo.hlinePixels = 1200;
cfg.timingInfo.yResLines = 1800;
cfg.timingInfo.vbpLines = 33;
cfg.timingInfo.vsaLines = 76;
cfg.timingInfo.vfpLines = 120;
cfg.timingInfo.xResPixels = 1342;
/* 写入配置数据 */
ret = MipiDsiSetCfg(g_handle, &cfg);
if (ret != 0) {
HDF_LOGE("%s: SetMipiCfg fail! ret=%d\n", __func__, ret);
return;
}
/* 发送PANEL初始化指令 */
struct DsiCmdDesc *cmd = OsalMemCalloc(sizeof(struct DsiCmdDesc));
if (cmd == NULL) {
return;
}
cmd->dtype = DTYPE_DCS_WRITE;
cmd->dlen = 1;
cmd->payload = OsalMemCalloc(sizeof(uint8_t));
if (cmd->payload == NULL) {
HdfFree(cmd);
return;
}
*(cmd->payload) = DTYPE_GEN_LWRITE;
MipiDsiSetLpMode(mipiHandle);
ret = MipiDsiTx(mipiHandle, cmd);
MipiDsiSetHsMode(mipiHandle);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%s: MipiDsiTx fail! ret=%d\n", __func__, ret);
HdfFree(cmd->payload);
HdfFree(cmd);
return;
}
HdfFree(cmd->payload);
HdfFree(cmd);
/* 回读panel状态寄存器 */
uint8_t readVal = 0;
struct DsiCmdDesc *cmdRead = OsalMemCalloc(sizeof(struct DsiCmdDesc));
if (cmdRead == NULL) {
return;
}
cmdRead->dtype = DTYPE_DCS_READ;
cmdRead->dlen = 1;
cmdRead->payload = OsalMemCalloc(sizeof(uint8_t));
if (cmdRead->payload == NULL) {
HdfFree(cmdRead);
return;
}
*(cmdRead->payload) = DDIC_REG_STATUS;
MipiDsiSetLpMode(g_handle);
ret = MipiDsiRx(g_handle, cmdRead, sizeof(readVal), &readVal);
MipiDsiSetHsMode(g_handle);
if (ret != HDF_SUCCESS) {
HDF_LOGE("%s: MipiDsiRx fail! ret=%d\n", __func__, ret);
HdfFree(cmdRead->payload);
HdfFree(cmdRead);
return;
}
HdfFree(cmdRead->payload);
HdfFree(cmdRead);
/* 释放MIPI DSI设备句柄 */
MipiDsiClose(handle);
}
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