djsundog/circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Use faster bus & remove final delay

Browse Source 
this pushes the LCD initialization down to about 1.3s.
This commit is contained in:
Jeff Epler 2023-09-18 12:59:43 -05:00
parent 5a60b8d573
commit faa6887050
No known key found for this signature in database
GPG Key ID: D5BF15AB975AB4DE
1 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
ports/espressif/boards/espressif_esp32s3_lcd_ev/board.c
View File

@ -80,7 +80,7 @@ static const uint8_t display_init_sequence[] = {
0x3a, 1, 0x66, 0x3a, 1, 0x66,
0x3a, 1, 0x66, 0x3a, 1, 0x66,
0x11, 0x80, 120, 0x11, 0x80, 120,
0x29, 0x80, 20 0x29, 0x0
}; };
static const mcu_pin_obj_t *red_pins[] = { static const mcu_pin_obj_t *red_pins[] = {
@ -122,25 +122,27 @@ void board_init(void) {
true true
); );
busio_i2c_obj_t *i2c = common_hal_board_create_i2c(0); busio_i2c_obj_t i2c;
i2c.base.type = &busio_i2c_type;
common_hal_busio_i2c_construct(&i2c, DEFAULT_I2C_BUS_SCL, DEFAULT_I2C_BUS_SDA, 400000, 255);
const int i2c_device_address = 32; const int i2c_device_address = 32;
common_hal_busio_i2c_try_lock(i2c); common_hal_busio_i2c_try_lock(&i2c);
{ {
uint8_t buf[2] = {3, 0xf1}; // set GPIO direction uint8_t buf[2] = {3, 0xf1}; // set GPIO direction
common_hal_busio_i2c_write(i2c, i2c_device_address, buf, sizeof(buf)); common_hal_busio_i2c_write(&i2c, i2c_device_address, buf, sizeof(buf));
} }
{ {
uint8_t buf[2] = {2, 0}; // set all output pins low initially uint8_t buf[2] = {2, 0}; // set all output pins low initially
common_hal_busio_i2c_write(i2c, i2c_device_address, buf, sizeof(buf)); common_hal_busio_i2c_write(&i2c, i2c_device_address, buf, sizeof(buf));
} }
common_hal_busio_i2c_unlock(i2c); common_hal_busio_i2c_unlock(&i2c);
dotclockframebuffer_ioexpander_spi_bus spibus = { dotclockframebuffer_ioexpander_spi_bus spibus = {
.bus = i2c, .bus = &i2c,
.i2c_device_address = i2c_device_address, .i2c_device_address = i2c_device_address,
.i2c_write_size = 2, .i2c_write_size = 2,
.addr_reg_shadow = { .u32 = 1 }, // GPIO data at register 1 .addr_reg_shadow = { .u32 = 1 }, // GPIO data at register 1
@ -151,6 +153,7 @@ void board_init(void) {
dotclockframebuffer_ioexpander_send_init_sequence(&spibus, display_init_sequence, sizeof(display_init_sequence)); dotclockframebuffer_ioexpander_send_init_sequence(&spibus, display_init_sequence, sizeof(display_init_sequence));
common_hal_busio_i2c_deinit(&i2c);
} }
// Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here. // Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.