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fix(i80_lcd): enhance the check of a valid data phase

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in case the user passes a (uint8_t){0x00} parameter with the perameter size
set to zero
This commit is contained in:
morris 2023-11-23 11:02:14 +08:00
parent 5c74467a5d
commit 1f79b5045d
1 changed files with 3 additions and 2 deletions
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5
components/esp_lcd/src/esp_lcd_panel_io_i80.c
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@ -444,8 +444,9 @@ static esp_err_t panel_io_i80_tx_param(esp_lcd_panel_io_t *io, int lcd_cmd, cons
trans_desc->i80_device = next_device;
trans_desc->cmd_cycles = cmd_cycles;
trans_desc->cmd_value = lcd_cmd;
trans_desc->data = param ? bus->format_buffer : NULL;
trans_desc->data_length = param ? param_len : 0;
// either the param is NULL or the param_size is zero, means there isn't a data phase in this transaction
trans_desc->data = (param && param_len) ? bus->format_buffer : NULL;
trans_desc->data_length = trans_desc->data ? param_len : 0;
trans_desc->trans_done_cb = NULL; // no callback for parameter transaction
// mount data to DMA links
lcd_com_mount_dma_data(bus->dma_nodes, trans_desc->data, trans_desc->data_length);