237 lines
7.6 KiB
C
237 lines
7.6 KiB
C
/*! @file Driver.c
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@brief
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@author Hendrik Schutter
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@version V1.0
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@date 03.11.2020
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*/
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#include "Driver.h"
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//Place data into DRAM. Constant data gets placed into DROM by default, which is not accessible by DMA.
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DRAM_ATTR static const lcd_init_cmd_t st_init_cmds[]= {
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/* Memory Data Access Control, MX=MV=1, MY=ML=MH=0, RGB=0 */
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{0x36, {(1<<5)|(1<<6)}, 1},
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/* Interface Pixel Format, 16bits/pixel for RGB/MCU interface */
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{0x3A, {0x55}, 1},
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/* Porch Setting */
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{0xB2, {0x0c, 0x0c, 0x00, 0x33, 0x33}, 5},
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/* Gate Control, Vgh=13.65V, Vgl=-10.43V */
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{0xB7, {0x45}, 1},
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/* VCOM Setting, VCOM=1.175V */
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{0xBB, {0x2B}, 1},
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/* LCM Control, XOR: BGR, MX, MH */
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{0xC0, {0x2C}, 1},
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/* VDV and VRH Command Enable, enable=1 */
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{0xC2, {0x01, 0xff}, 2},
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/* VRH Set, Vap=4.4+... */
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{0xC3, {0x11}, 1},
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/* VDV Set, VDV=0 */
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{0xC4, {0x20}, 1},
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/* Frame Rate Control, 60Hz, inversion=0 */
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{0xC6, {0x0f}, 1},
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/* Power Control 1, AVDD=6.8V, AVCL=-4.8V, VDDS=2.3V */
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{0xD0, {0xA4, 0xA1}, 1},
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/* Positive Voltage Gamma Control */
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{0xE0, {0xD0, 0x00, 0x05, 0x0E, 0x15, 0x0D, 0x37, 0x43, 0x47, 0x09, 0x15, 0x12, 0x16, 0x19}, 14},
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/* Negative Voltage Gamma Control */
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{0xE1, {0xD0, 0x00, 0x05, 0x0D, 0x0C, 0x06, 0x2D, 0x44, 0x40, 0x0E, 0x1C, 0x18, 0x16, 0x19}, 14},
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/* Sleep Out */
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{0x11, {0}, 0x80},
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/* Display On */
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{0x29, {0}, 0x80},
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{0, {0}, 0xff}
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};
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DRAM_ATTR static const lcd_init_cmd_t ili_init_cmds[]= {
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/* Power contorl B, power control = 0, DC_ENA = 1 */
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{0xCF, {0x00, 0x83, 0X30}, 3},
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/* Power on sequence control,
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* cp1 keeps 1 frame, 1st frame enable
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* vcl = 0, ddvdh=3, vgh=1, vgl=2
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* DDVDH_ENH=1
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*/
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{0xED, {0x64, 0x03, 0X12, 0X81}, 4},
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/* Driver timing control A,
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* non-overlap=default +1
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* EQ=default - 1, CR=default
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* pre-charge=default - 1
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*/
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{0xE8, {0x85, 0x01, 0x79}, 3},
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/* Power control A, Vcore=1.6V, DDVDH=5.6V */
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{0xCB, {0x39, 0x2C, 0x00, 0x34, 0x02}, 5},
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/* Pump ratio control, DDVDH=2xVCl */
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{0xF7, {0x20}, 1},
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/* Driver timing control, all=0 unit */
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{0xEA, {0x00, 0x00}, 2},
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/* Power control 1, GVDD=4.75V */
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{0xC0, {0x26}, 1},
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/* Power control 2, DDVDH=VCl*2, VGH=VCl*7, VGL=-VCl*3 */
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{0xC1, {0x11}, 1},
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/* VCOM control 1, VCOMH=4.025V, VCOML=-0.950V */
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{0xC5, {0x35, 0x3E}, 2},
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/* VCOM control 2, VCOMH=VMH-2, VCOML=VML-2 */
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{0xC7, {0xBE}, 1},
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/* Memory access contorl, MX=MY=0, MV=1, ML=0, BGR=1, MH=0 */
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{0x36, {0x28}, 1},
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/* Pixel format, 16bits/pixel for RGB/MCU interface */
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{0x3A, {0x55}, 1},
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/* Frame rate control, f=fosc, 70Hz fps */
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{0xB1, {0x00, 0x1B}, 2},
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/* Enable 3G, disabled */
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{0xF2, {0x08}, 1},
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/* Gamma set, curve 1 */
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{0x26, {0x01}, 1},
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/* Positive gamma correction */
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{0xE0, {0x1F, 0x1A, 0x18, 0x0A, 0x0F, 0x06, 0x45, 0X87, 0x32, 0x0A, 0x07, 0x02, 0x07, 0x05, 0x00}, 15},
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/* Negative gamma correction */
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{0XE1, {0x00, 0x25, 0x27, 0x05, 0x10, 0x09, 0x3A, 0x78, 0x4D, 0x05, 0x18, 0x0D, 0x38, 0x3A, 0x1F}, 15},
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/* Column address set, SC=0, EC=0xEF */
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{0x2A, {0x00, 0x00, 0x00, 0xEF}, 4},
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/* Page address set, SP=0, EP=0x013F */
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{0x2B, {0x00, 0x00, 0x01, 0x3f}, 4},
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/* Memory write */
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{0x2C, {0}, 0},
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/* Entry mode set, Low vol detect disabled, normal display */
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{0xB7, {0x07}, 1},
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/* Display function control */
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{0xB6, {0x0A, 0x82, 0x27, 0x00}, 4},
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/* Sleep out */
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{0x11, {0}, 0x80},
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/* Display on */
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{0x29, {0}, 0x80},
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{0, {0}, 0xff},
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};
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/* Send a command to the LCD. Uses spi_device_polling_transmit, which waits
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* until the transfer is complete.
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*
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* Since command transactions are usually small, they are handled in polling
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* mode for higher speed. The overhead of interrupt transactions is more than
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* just waiting for the transaction to complete.
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*/
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void vDriver_cmd(spi_device_handle_t spi, const uint8_t cmd)
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{
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esp_err_t ret;
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spi_transaction_t t;
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memset(&t, 0, sizeof(t)); //Zero out the transaction
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t.length=8; //Command is 8 bits
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t.tx_buffer=&cmd; //The data is the cmd itself
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t.user=(void*)0; //D/C needs to be set to 0
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ret=spi_device_polling_transmit(spi, &t); //Transmit!
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assert(ret==ESP_OK); //Should have had no issues.
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}
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/* Send data to the LCD. Uses spi_device_polling_transmit, which waits until the
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* transfer is complete.
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*
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* Since data transactions are usually small, they are handled in polling
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* mode for higher speed. The overhead of interrupt transactions is more than
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* just waiting for the transaction to complete.
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*/
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void vDriver_data(spi_device_handle_t spi, const uint8_t *data, int len)
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{
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esp_err_t ret;
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spi_transaction_t t;
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if (len==0) return; //no need to send anything
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memset(&t, 0, sizeof(t)); //Zero out the transaction
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t.length=len*8; //Len is in bytes, transaction length is in bits.
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t.tx_buffer=data; //Data
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t.user=(void*)1; //D/C needs to be set to 1
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ret=spi_device_polling_transmit(spi, &t); //Transmit!
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assert(ret==ESP_OK); //Should have had no issues.
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}
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//This function is called (in irq context!) just before a transmission starts. It will
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//set the D/C line to the value indicated in the user field.
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void vDriver_spi_pre_transfer_callback(spi_transaction_t *t)
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{
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int dc=(int)t->user;
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gpio_set_level(PIN_NUM_DC, dc);
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}
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uint32_t vDriver_get_id(spi_device_handle_t spi)
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{
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//get_id cmd
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vDriver_cmd(spi, 0x04);
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spi_transaction_t t;
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memset(&t, 0, sizeof(t));
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t.length=8*3;
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t.flags = SPI_TRANS_USE_RXDATA;
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t.user = (void*)1;
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esp_err_t ret = spi_device_polling_transmit(spi, &t);
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assert( ret == ESP_OK );
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return *(uint32_t*)t.rx_data;
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}
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//Initialize the display
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void vDriver_init(spi_device_handle_t spi)
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{
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int cmd=0;
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const lcd_init_cmd_t* lcd_init_cmds;
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//Initialize non-SPI GPIOs
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gpio_set_direction(PIN_NUM_DC, GPIO_MODE_OUTPUT);
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gpio_set_direction(PIN_NUM_RST, GPIO_MODE_OUTPUT);
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gpio_set_direction(PIN_NUM_BCKL, GPIO_MODE_OUTPUT);
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//Reset the display
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gpio_set_level(PIN_NUM_RST, 0);
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vTaskDelay(100 / portTICK_RATE_MS);
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gpio_set_level(PIN_NUM_RST, 1);
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vTaskDelay(100 / portTICK_RATE_MS);
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//detect LCD type
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uint32_t lcd_id = vDriver_get_id(spi);
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int lcd_detected_type = 0;
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int lcd_type;
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printf("LCD ID: %08X\n", lcd_id);
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if ( lcd_id == 0 ) {
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//zero, ili
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lcd_detected_type = LCD_TYPE_ILI;
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printf("ILI9341 detected.\n");
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} else {
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// none-zero, ST
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lcd_detected_type = LCD_TYPE_ST;
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printf("ST7789V detected.\n");
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}
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#ifdef CONFIG_LCD_TYPE_AUTO
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lcd_type = lcd_detected_type;
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#elif defined( CONFIG_LCD_TYPE_ST7789V )
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printf("kconfig: force CONFIG_LCD_TYPE_ST7789V.\n");
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lcd_type = LCD_TYPE_ST;
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#elif defined( CONFIG_LCD_TYPE_ILI9341 )
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printf("kconfig: force CONFIG_LCD_TYPE_ILI9341.\n");
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lcd_type = LCD_TYPE_ILI;
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#endif
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if ( lcd_type == LCD_TYPE_ST ) {
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printf("LCD ST7789V initialization.\n");
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lcd_init_cmds = st_init_cmds;
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} else {
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printf("LCD ILI9341 initialization.\n");
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lcd_init_cmds = ili_init_cmds;
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}
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//Send all the commands
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while (lcd_init_cmds[cmd].databytes!=0xff) {
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vDriver_cmd(spi, lcd_init_cmds[cmd].cmd);
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vDriver_data(spi, lcd_init_cmds[cmd].data, lcd_init_cmds[cmd].databytes&0x1F);
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if (lcd_init_cmds[cmd].databytes&0x80) {
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vTaskDelay(100 / portTICK_RATE_MS);
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}
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cmd++;
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}
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///Enable backlight
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gpio_set_level(PIN_NUM_BCKL, 0);
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}
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