哪位在75上面调过DBI接口的屏？

时间：10-02 整理：3721RD 点击：

哪位在75上面调过DBI接口的屏?
请交流一下经验，我的屏现在没显示，打印log驱动已经跑到了。但是ID读出来是错的，硬件确认没有问题。数据线上在背光量的时候是有数据。

MT6575端的LCD部分原理图

ID 读出来是错的就不要读ID 嘛
先直接返回1 ，如果还是不亮，让屏厂技术支持换个初始化代码。还有顺便说一下你自己的屏的IC 型号。

不读ID也不亮呀！

你先说自己用的哪个屏，多少位接口的
说不定谁用过，直接就代码给你了

r61529芯片 16位DBI的接口。

11AMDW1222SP_TECHFAITH15_CU_ICS2_V30_GPRS_MMI版本。

static void lcm_get_params(LCM_PARAMS *params)
{
memset(params, 0, sizeof(LCM_PARAMS));
params->type = LCM_TYPE_DBI;
params->ctrl = LCM_CTRL_PARALLEL_DBI;
params->width  = FRAME_WIDTH;
params->height = FRAME_HEIGHT;
params->io_select_mode = 1; //note:this para is different between 6573 and 6575
#if 0
params->dbi.port                   = 0;
params->dbi.clock_freq             = LCM_DBI_CLOCK_FREQ_104M;
params->dbi.data_width             = LCM_DBI_DATA_WIDTH_16BITS;
params->dbi.data_format.color_order = LCM_COLOR_ORDER_RGB;
params->dbi.data_format.trans_seq = LCM_DBI_TRANS_SEQ_MSB_FIRST;
params->dbi.data_format.padding    = LCM_DBI_PADDING_ON_LSB;
params->dbi.data_format.format    = LCM_DBI_FORMAT_RGB565;
params->dbi.data_format.width    = LCM_DBI_DATA_WIDTH_16BITS;
params->dbi.cpu_write_bits       = LCM_DBI_CPU_WRITE_32_BITS;
params->dbi.io_driving_current    = LCM_DRIVING_CURRENT_8MA;
#endif
params->dbi.port                   = 0;  //DBI port must be 0 or 1 on mt6575, should not be 2
params->dbi.data_width             = LCM_DBI_DATA_WIDTH_16BITS;
params->dbi.data_format.color_order = LCM_COLOR_ORDER_RGB;
params->dbi.data_format.trans_seq = LCM_DBI_TRANS_SEQ_MSB_FIRST;
params->dbi.data_format.padding    = LCM_DBI_PADDING_ON_LSB;
params->dbi.data_format.format    = LCM_DBI_FORMAT_RGB565;
params->dbi.data_format.width    = LCM_DBI_DATA_WIDTH_16BITS;
params->dbi.cpu_write_bits       = LCM_DBI_CPU_WRITE_32_BITS;
params->dbi.io_driving_current    = LCM_DRIVING_CURRENT_6575_8MA;

params->dbi.parallel.write_setup = 1;
params->dbi.parallel.write_hold    = 1;
params->dbi.parallel.write_wait    = 3;
params->dbi.parallel.read_setup    = 3;
params->dbi.parallel.read_latency = 15;
params->dbi.parallel.read_latency = 0;
params->dbi.parallel.wait_period = 1;
params->dbi.parallel.cs_high_width  = 0; //cycles of cs high level between each transfer
// enable tearing-free
// params->dbi.te_mode                = LCM_DBI_TE_MODE_VSYNC_ONLY;
// params->dbi.te_edge_polarity       = LCM_POLARITY_RISING;
}
你的屏的接法呢?
将BB端的LCD相关的电路贴出来看看。