【Vision Board创客营连载体验】RA8D1-Vision Board 驱动正点原子7寸RGB液晶屏

开发板

RA8D1-Vision Board开发板带了跟正点原子一样的RGB液晶屏接口，因此是可以接原子的屏的：

RASC配置RGB565十六位色接口（引脚为RGB666十八位色，但是屏幕只用到了前十六位，也就是DATA0~DATA15）：

配置TCON0 TCON1 TCON3分别为HSYNC VSYNC DE：

显示屏驱动代码：

#define LCD_WIDTH 1024
#define LCD_HEIGHT 600
uint16_t *lcd_current_working_buffer = (uint16_t *) &fb_background[0];
void ra_bsp_lcd_clear(uint16_t color)
{
for (uint32_t i = 0; i < (LCD_WIDTH * LCD_HEIGHT); i++)
{
lcd_current_working_buffer[i] = color;
}
}
void bsp_lcd_draw_pixel(uint32_t x, uint32_t y, uint16_t color)
{
lcd_current_working_buffer[(y * LCD_WIDTH) + x] = color;
}
void lcd_fill_rectangle(uint16_t x_start, uint16_t y_start, uint16_t x_end, uint16_t y_end, uint16_t pixcolor)
{
uint16_t cycle_y, x_offset = 0;
for (cycle_y = y_start; cycle_y <= y_end;)
{
for (x_offset = 0; x_start + x_offset <= x_end; x_offset++)
{
bsp_lcd_draw_pixel(x_start + x_offset, cycle_y, pixcolor);
}
cycle_y++;
}
}

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SDRAM驱动代码：

#define BSP_PRV_SDRAM_SDIR_REF_TIMES (2U)
#define BSP_PRV_SDRAM_BUS_WIDTH (0U)
#define BSP_PRV_SDRAM_CONTINUOUS_ACCESSMODE (1U)
#define BSP_PRV_SDRAM_ENDIAN_MODE (0U)
#define BSP_PRV_SDRAM_MR_WB_SINGLE_LOC_ACC (1U) /* MR.M9 : Single Location Access */
#define BSP_PRV_SDRAM_MR_OP_MODE (0U) /* MR.M8:M7 : Standard Operation */
#define BSP_PRV_SDRAM_MR_BT_SEQUENCTIAL (0U) /* MR.M3 Burst Type : Sequential */
#define BSP_PRV_SDRAM_MR_BURST_LENGTH (0U) /* MR.M2:M0 Burst Length: 0(1 burst) */
#define BSP_PRV_SDRAM_CL (3U)
#define BSP_PRV_SDRAM_TRP (3U)
#define BSP_PRV_SDRAM_TWR (2U)
#define BSP_PRV_SDRAM_TRAS (6U)
#define BSP_PRV_SDRAM_TRCD (3U)
#define BSP_PRV_SDRAM_SDADR_ROW_ADDR_OFFSET (9U)
#define BSP_PRV_SDRAM_TRFC (8U)
#define BSP_PRV_SDRAM_REF_CMD_INTERVAL (937U)
void bsp_sdram_init (void)
{
/** Setting for SDRAM initialization sequence */
#if (BSP_PRV_SDRAM_TRP < 3)
R_BUS->SDRAM.SDIR_b.PRC = 3U;
#else
R_BUS->SDRAM.SDIR_b.PRC = BSP_PRV_SDRAM_TRP - 3U;
#endif
while (R_BUS->SDRAM.SDSR)
{
/* According to h/w maual, need to confirm that all the status bits in SDSR are 0 before SDIR modification. */
}
R_BUS->SDRAM.SDIR_b.ARFC = BSP_PRV_SDRAM_SDIR_REF_TIMES;
while (R_BUS->SDRAM.SDSR)
{
/* According to h/w maual, need to confirm that all the status bits in SDSR are 0 before SDIR modification. */
}
#if (BSP_PRV_SDRAM_TRFC < 3)
R_BUS->SDRAM.SDIR_b.ARFI = 0U;
#else
R_BUS->SDRAM.SDIR_b.ARFI = BSP_PRV_SDRAM_TRFC - 3U;
#endif
while (R_BUS->SDRAM.SDSR)
{
/* According to h/w maual, need to confirm that all the status bits in SDSR are 0 before SDICR modification. */
}
/** Start SDRAM initialization sequence.
* Following operation is automatically done when set SDICR.INIRQ bit.
* Perform a PRECHARGE ALL command and wait at least tRP time.
* Issue an AUTO REFRESH command and wait at least tRFC time.
* Issue an AUTO REFRESH command and wait at least tRFC time.
*/
R_BUS->SDRAM.SDICR_b.INIRQ = 1U;
while (R_BUS->SDRAM.SDSR_b.INIST)
{
/* Wait the end of initialization sequence. */
}
/** Setting for SDRAM controller */
R_BUS->SDRAM.SDCCR_b.BSIZE = BSP_PRV_SDRAM_BUS_WIDTH; /* set SDRAM bus width */
R_BUS->SDRAM.SDAMOD_b.BE = BSP_PRV_SDRAM_CONTINUOUS_ACCESSMODE; /* enable continuous access */
R_BUS->SDRAM.SDCMOD_b.EMODE = BSP_PRV_SDRAM_ENDIAN_MODE; /* set endian mode for SDRAM address space */
while (R_BUS->SDRAM.SDSR)
{
/* According to h/w maual, need to confirm that all the status bits in SDSR are 0 before SDMOD modification. */
}
/** Using LMR command, program the mode register */
R_BUS->SDRAM.SDMOD = ((((uint16_t) (BSP_PRV_SDRAM_MR_WB_SINGLE_LOC_ACC << 9) |
(uint16_t) (BSP_PRV_SDRAM_MR_OP_MODE << 7)) |
(uint16_t) (BSP_PRV_SDRAM_CL << 4)) |
(uint16_t) (BSP_PRV_SDRAM_MR_BT_SEQUENCTIAL << 3)) |
(uint16_t) (BSP_PRV_SDRAM_MR_BURST_LENGTH << 0);
/** wait at least tMRD time */
while (R_BUS->SDRAM.SDSR_b.MRSST)
{
/* Wait until Mode Register setting done. */
}
/** Set timing parameters for SDRAM */
R_BUS->SDRAM.SDTR_b.RAS = BSP_PRV_SDRAM_TRAS - 1U; /* set ACTIVE-to-PRECHARGE command cycles*/
R_BUS->SDRAM.SDTR_b.RCD = BSP_PRV_SDRAM_TRCD - 1U; /* set ACTIVE to READ/WRITE delay cycles */
R_BUS->SDRAM.SDTR_b.RP = BSP_PRV_SDRAM_TRP - 1U; /* set PRECHARGE command period cycles */
R_BUS->SDRAM.SDTR_b.WR = BSP_PRV_SDRAM_TWR - 1U; /* set write recovery cycles */
R_BUS->SDRAM.SDTR_b.CL = BSP_PRV_SDRAM_CL; /* set SDRAM column latency cycles */
/** Set row address offset for target SDRAM */
R_BUS->SDRAM.SDADR_b.MXC = BSP_PRV_SDRAM_SDADR_ROW_ADDR_OFFSET - 8U;
R_BUS->SDRAM.SDRFCR_b.REFW = (uint16_t) (BSP_PRV_SDRAM_TRFC - 1U); /* set Auto-Refresh issuing cycle */
R_BUS->SDRAM.SDRFCR_b.RFC = BSP_PRV_SDRAM_REF_CMD_INTERVAL - 1U; /* set Auto-Refresh period */
/** Start Auto-refresh */
R_BUS->SDRAM.SDRFEN_b.RFEN = 1U;
/** Enable SDRAM access */
R_BUS->SDRAM.SDCCR_b.EXENB = 1U;
}

复制代码

显示效果：

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【Vision Board创客营连载体验】RA8D1-Vision Board 驱动正点原子7寸RGB液晶屏

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