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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-1-16 Wayne First version
*
******************************************************************************/
#include <rtconfig.h>
#if defined(NU_PKG_USING_ILI9341_SPI)
#include <rtdevice.h>
#include <lcd_ili9341.h>
#if !defined(NU_PKG_USING_ILI9341_SPI_CLK_FREQ)
#define NU_PKG_USING_ILI9341_SPI_CLK_FREQ 48000000
#endif
static struct rt_spi_device ili9341_spi_device;
static struct rt_spi_configuration ili9341_cfg =
{
.mode = RT_SPI_MODE_0 | RT_SPI_MSB,
.data_width = 8,
.max_hz = NU_PKG_USING_ILI9341_SPI_CLK_FREQ,
};
static void ili9341_change_datawidth(int data_width)
{
if (ili9341_cfg.data_width != data_width)
{
ili9341_cfg.data_width = data_width;
rt_spi_configure(&ili9341_spi_device, &ili9341_cfg);
}
}
void ili9341_send_cmd(rt_uint8_t cmd)
{
ili9341_change_datawidth(8);
CLR_RS;
rt_spi_transfer(&ili9341_spi_device, (const void *)&cmd, NULL, 1);
SET_RS;
}
void ili9341_send_cmd_parameter(uint8_t data)
{
ili9341_change_datawidth(8);
rt_spi_transfer(&ili9341_spi_device, (const void *)&data, NULL, 1);
}
static void ili9341_write_data_16bit(uint16_t data)
{
ili9341_change_datawidth(16);
rt_spi_transfer(&ili9341_spi_device, (const void *)&data, NULL, 2);
}
void ili9341_send_pixel_data(rt_uint16_t pixel)
{
ili9341_write_data_16bit(pixel);
}
void ili9341_send_pixels(rt_uint16_t *pixels, int len)
{
ili9341_change_datawidth(16);
rt_spi_transfer(&ili9341_spi_device, (const void *)pixels, NULL, len);
}
static rt_err_t ili9341_spi_send_then_recv(struct rt_spi_device *device,
const void *send_buf,
rt_size_t send_length,
void *recv_buf,
rt_size_t recv_length)
{
rt_err_t result;
struct rt_spi_message message;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(device->bus != RT_NULL);
ili9341_change_datawidth(8);
result = rt_mutex_take(&(device->bus->lock), RT_WAITING_FOREVER);
if (result == RT_EOK)
{
if (device->bus->owner != device)
{
/* not the same owner as current, re-configure SPI bus */
result = device->bus->ops->configure(device, &device->config);
if (result == RT_EOK)
{
/* set SPI bus owner */
device->bus->owner = device;
}
else
{
/* configure SPI bus failed */
result = -RT_EIO;
goto __exit;
}
}
/* send data */
message.send_buf = send_buf;
message.recv_buf = RT_NULL;
message.length = send_length;
message.cs_take = 1;
message.cs_release = 0;
message.next = RT_NULL;
CLR_RS;
result = device->bus->ops->xfer(device, &message);
SET_RS;
if (result == 0)
{
result = -RT_EIO;
goto __exit;
}
/* recv data */
message.send_buf = RT_NULL;
message.recv_buf = recv_buf;
message.length = recv_length;
message.cs_take = 0;
message.cs_release = 1;
message.next = RT_NULL;
result = device->bus->ops->xfer(device, &message);
if (result == 0)
{
result = -RT_EIO;
goto __exit;
}
result = RT_EOK;
}
else
{
return -RT_EIO;
}
__exit:
rt_mutex_release(&(device->bus->lock));
return result;
}
void ili9341_set_column(uint16_t StartCol, uint16_t EndCol)
{
ili9341_send_cmd(0x2A);
ili9341_write_data_16bit(StartCol);
ili9341_write_data_16bit(EndCol);
}
void ili9341_set_page(uint16_t StartPage, uint16_t EndPage)
{
ili9341_send_cmd(0x2B);
ili9341_write_data_16bit(StartPage);
ili9341_write_data_16bit(EndPage);
}
void ili9341_lcd_get_pixel(char *color, int x, int y)
{
uint8_t cmd;
typedef union
{
rt_uint32_t rgbx;
struct
{
rt_uint8_t x;
rt_uint8_t r;
rt_uint8_t g;
rt_uint8_t b;
} S;
} ili9341_pixel;
ili9341_pixel bgrx;
if (x >= XSIZE_PHYS || y >= YSIZE_PHYS)
{
*(rt_uint16_t *)color = 0;
return;
}
ili9341_set_column(x, x);
ili9341_set_page(y, y);
cmd = 0x2E;
ili9341_spi_send_then_recv(&ili9341_spi_device, &cmd, 1, &bgrx, 4);
//rt_kprintf("%08x.\n", bgrx);
// To RGB565
*(rt_uint16_t *)color = ((bgrx.S.r >> 3) << 11) | ((bgrx.S.g >> 2) << 5) | (bgrx.S.b >> 3);
}
rt_err_t rt_hw_lcd_ili9341_spi_init(const char *spibusname, void *pvUserData)
{
if (rt_spi_bus_attach_device(&ili9341_spi_device, "lcd_ili9341", spibusname, pvUserData) != RT_EOK)
return -RT_ERROR;
if (pvUserData != RT_NULL)
{
// GPIO CS pin mode to output */
rt_pin_mode(*((rt_base_t *)pvUserData), PIN_MODE_OUTPUT);
}
rt_kprintf("Preferred ili9341 spi clock frequency is %d Hz.\n", NU_PKG_USING_ILI9341_SPI_CLK_FREQ);
return rt_spi_configure(&ili9341_spi_device, &ili9341_cfg);
}
#endif /* #if defined(NU_PKG_USING_ILI9341_SPI) */
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