应用dts在am335x上移植LCD（三）
AM335x开发板
红色为注释了的
蓝色为添加上的
PATH 表示当前修改文件的路径
line 表示要修改的代码在当前文件的开始行
在原来的开发板上
修改 LCD 的分辨率：
ti-sdk-am335x-evm/board-support/linux-3.2-psp04.06.00.07.sdk/drivers/video/da8xx-fb.c
//@line 275
[3] = {
.name = "HANSTAR_HSD070IDW1_A",
//@@ .width = 800,
//@@ .height = 480,
.width = 800, //@@
.height = 600, //@@
.hfp = 210,
.hbp = 46,
.hsw = 40,
.vfp = 12,
.vbp = 23,
.vsw = 20,
.pxl_clk = 40000000,
.invert_pxl_clk = 0,
},
/* add end */
修改 LCD 显示ide颜色位，从24色 变为 16色
1)、先修改 bpp 的取值范围
ti-sdk-am335x-evm/board-support/linux-3.2-psp04.06.00.07.sdk/arch/arm/mach-omap2
/board-am335xevm.c
//@line 127
static const struct display_panel disp_panel = {
WVGA,
//@@ 32,
32, //@@max_bpp
//@@ 32,
8, //@@min_bpp
COLOR_ACTIVE,
};
2)、再修改当前 LCD 配置的 bpp 大小
ti-sdk-am335x-evm/board-support/linux-3.2-psp04.06.00.07.sdk/arch/arm/mach-omap2
/board-am335xevm.c
//@line 154
static struct lcd_ctrl_config lcd_cfg = {
&disp_panel,
.ac_bias = 255,
.ac_bias_intrpt = 0,
.dma_burst_sz = 16,
//@@ .bpp = 32,
.bpp = 16, //@@
.fdd = 0x80,
.tft_alt_mode = 0,
.stn_565_mode = 0,
.mono_8bit_mode = 0,
.invert_line_clock = 1,
.invert_frm_clock = 1,
.sync_edge = 0,
.sync_ctrl = 1,
.raster_order = 0,
};
使能 uart2。
需要修改 uart2 rxd，txd 的 pin 属性
硬件上修改
焊接 R486，R487
软件上修改
uart2 的 pin 配置
PATH: linux-3.2-psp04.06.07.sdk/arch/arm/mach-omap2/board-am335xevm.c
//line 668
/* Module pin mux for uart2 */
static struct pinmux_config uart2_pin_mux[] = {
/*@@
{"spi0_sclk.uart2_rxd", OMAP_MUX_MODE1 | AM33XX_SLEWCTRL_SLOW |
AM33XX_PIN_INPUT_PULLUP},
{"spi0_d0.uart2_txd", OMAP_MUX_MODE1 | AM33XX_PULL_UP |
AM33XX_PULL_DISA |
AM33XX_SLEWCTRL_SLOW},
@@*/
{"spi0_sclk.uart2_rxd", OMAP_MUX_MODE1 | AM33XX_PIN_INPUT_PULLUP},
{"spi0_d0.uart2_txd",OMAP_MUX_MODE1 | AM33XX_PULL_UP | AM33XX_PULL_ENBL},
{NULL, 0},
};
失能 spi0
PATH: linux-3.2-psp04.06.07.sdk/arch/arm/mach-omap2/board-am335xevm.c
//line 1795 @@
//@@ {spi0_init, DEV_ON_DGHTR_BRD, PROFILE_2}; //uart2_rxd/txd_mux3
修改当前 uart2 使用的板子类型
PATH: linux-3.2-psp04.06.07.sdk/arch/arm/mach-omap2/board-am335xevm.c
// line 1802
//@@ {uart2_init, DEV_ON_DGHTR_BRD, PROFILE_3},
{uart2_init, DEV_ON_BASEBOARD, PROFILE_ALL}, //@@
使能 uart4
硬件上的修改：
焊接上 R362，使 uart4 txd 端可以发送数据;
断开 R364 的连接(这是 U18 的 ROUT2 端，uart4 通过该端口接收数据)，
断开 R61 的连接(U4 的 pin 45 连接着 AM335X_UART0_CTSn，这会使 uart4 无法接收数据)，把(R364与 MCU 的连接端)与 (J52 的 pin 5)相连接，使 uart4 rxd端可以通过 UART0_CTSn 接收数据;
软件上的修改：
在 UART0_CTSN pin 上添加 uart4 rxd
在 UART0_RTSN pin 上添加 uart4 txd
PATH：linux-3.2-psp04.06.00.07.sdk/arch/arm/mach-omap2
//line 302 @@
/*@@
_AM33XX_MUXENTRY(UART0_CTSN, 0,
"uart0_ctsn", NULL, "d_can1_tx", "i2c1_sda",
"spi1_d0", NULL, NULL, "gpio1_8"),
_AM33XX_MUXENTRY(UART0_RTSN, 0,
"uart0_rtsn", NULL, "d_can1_rx", "i2c1_scl",
"spi1_d1", "spi1_cs0", NULL, "gpio1_9"),
@@*/
//@@
_AM33XX_MUXENTRY(UART0_CTSN, 0,
"uart0_ctsn", "uart4_rxd", "d_can1_tx", "i2c1_sda",
"spi1_d0", NULL, NULL, "gpio1_8"),
_AM33XX_MUXENTRY(UART0_RTSN, 0,
"uart0_rtsn", "uart4_txd", "d_can1_rx", "i2c1_scl",
"spi1_d1", "spi1_cs0", NULL, "gpio1_9"),
//@@
添加 uart4 的配置等
PATH: linux-3.2-psp04.06.07.sdk/arch/arm/mach-omap2/board-am335xevm.c
添加 uart4 的配置
//line 683 @@
/*@@ uart4*/
static struct pinmux_config uart4_pin_mux[] = {
{"uart0_ctsn.uart4_rxd",OMAP_MUX_MODE1 | AM33XX_PIN_INPUT_PULLUP},
{"uart0_rtsn.uart4_txd",OMAP_MUX_MODE1 | AM33XX_PULL_ENBL},
{NULL, 0},
};
添加 uart4 的初始化
//line 1073 @@
/*@@ setup uart4 */
static void uart4_init(int evm_id, int profile)
{
setup_pin_mux(uart4_pin_mux);
return;
}
把 uart4 的初始化添加到开机启动中
//line 1086 @@
{uart4_init, DEV_ON_BASEBOARD, PROFILE_ALL}, //@@
失能 d_can_init，其会影响 uart4 的 收发
//line 1800
//@@ {d_can_init, DEV_ON_DGHTR_BRD, PROFILE_1}, //uart4_rxd/txd_mux1
使能 uart3
硬件上修改;
焊接 J51 上的 R495，使 ECAP0_IN_PWM0_OUT 管脚可以复用为 UART3_TXD。
断开 J4 (MMC0) 上的 R380，使 AM335x_SPI0_CS1 管脚可以复用为 UART_RXD。把(R380中连接MMC0 卡套端)与(TP69(AM335X_MCASP0_ACLKX))相连接，使能MMC0，使系统可以从 SD卡启动
软件上修改
PATH: linux-3.2-psp04.06.07.sdk/arch/arm/mach-omap2/board-am335xevm.c
重新配置 MMC0
//line 607 @@
/* Module pin mux for mmc0 */
/* Module pin mux for mmc0 */
static struct pinmux_config mmc0_pin_mux[] = {
{"mmc0_dat3.mmc0_dat3", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mmc0_dat2.mmc0_dat2", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mmc0_dat1.mmc0_dat1", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mmc0_dat0.mmc0_dat0", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mmc0_clk.mmc0_clk", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mmc0_cmd.mmc0_cmd", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLUP},
{"mcasp0_aclkr.mmc0_sdwp",OMAP_MUX_MODE7 | AM33XX_PIN_INPUT_PULLUP},
//@@注释 {"spi0_cs1.mmc0_sdcd", OMAP_MUX_MODE7 | AM33XX_PIN_INPUT_PULLUP},
{"mcasp0_aclkx.mmc0_sdcd", OMAP_MUX_MODE7 | AM33XX_PIN_INPUT_PULLUP},//@@添加
{NULL, 0},
};
把 uart3 的初始化添加到开机启动中
//line 1805
{uart3_init, DEV_ON_BASEBOARD, PROFILE_ALL}, //@@
/* Style Definitions */ table.MsoNormalTable {mso-style-name:普通表格; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}
TQ335X开发板：http://www.embedsky.com/index.php?s=/Product/show/id/49.html