ScStw/ESP32-HUB75-MatrixPanel-DMA
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init gpio pins

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This commit is contained in:
Oliver Seiler 2023-07-05 12:56:59 +12:00
parent 88a14afa1c
commit e75716400e
1 changed files with 14 additions and 0 deletions
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14
src/ESP32-HUB75-MatrixPanel-leddrivers.cpp
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@ -106,6 +106,9 @@ void MatrixPanel_I2S_DMA::dp3246init(const HUB75_I2S_CFG& _cfg) {
ESP_LOGI("LEDdrivers", "MatrixPanel_I2S_DMA - initializing DP3246 driver...");
// DP3246 needs positive clock edge
m_cfg.clkphase = true;
// 15:13 3 000 reserved
// 12:9 4 0000 OE widening (= OE_ADD * 6ns)
// 8 1 0 reserved
@ -123,12 +126,23 @@ void MatrixPanel_I2S_DMA::dp3246init(const HUB75_I2S_CFG& _cfg) {
bool REG2[16] = { 1,1,1,1,1, 1,1,1, 0, 0, 0, 0, 0, 0,0,0 }; // MSB first
for (uint8_t _pin : {_cfg.gpio.r1, _cfg.gpio.r2, _cfg.gpio.g1, _cfg.gpio.g2, _cfg.gpio.b1, _cfg.gpio.b2, _cfg.gpio.clk, _cfg.gpio.lat, _cfg.gpio.oe}) {
gpio_reset_pin((gpio_num_t)_pin); // some pins are not un gpio mode after reset => https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/gpio.html#gpio-summary
gpio_set_direction((gpio_num_t)_pin, GPIO_MODE_OUTPUT);
gpio_set_level((gpio_num_t)_pin, LOW);
}
gpio_set_level((gpio_num_t)_cfg.gpio.oe, HIGH); // disable Display
// clear registers - this seems to help with reliability
for (int l = 0; l < PIXELS_PER_ROW; ++l) {
if (l == PIXELS_PER_ROW - 3) { // DP3246 wants the latch dropped for 3 clk cycles
gpio_set_level((gpio_num_t)_cfg.gpio.lat, HIGH);
}
CLK_PULSE
}
gpio_set_level((gpio_num_t)_cfg.gpio.lat, LOW);
// Send Data to control register REG1
for (int l = 0; l < PIXELS_PER_ROW; l++) {
for (uint8_t _pin : {_cfg.gpio.r1, _cfg.gpio.r2, _cfg.gpio.g1, _cfg.gpio.g2, _cfg.gpio.b1, _cfg.gpio.b2})