Initial support for DP3246_SM5368

1 files changed, 75 insertions, 0 deletions

diff --git a/src/ESP32-HUB75-MatrixPanel-leddrivers.cpp b/src/ESP32-HUB75-MatrixPanel-leddrivers.cpp
index 0bb20f7..d3a70eb 100644
--- a/src/ESP32-HUB75-MatrixPanel-leddrivers.cpp
+++ b/src/ESP32-HUB75-MatrixPanel-leddrivers.cpp
@@ -27,6 +27,9 @@ void MatrixPanel_I2S_DMA::shiftDriver(const HUB75_I2S_CFG& _cfg){
     case HUB75_I2S_CFG::FM6126A:
         fm6124init(_cfg);
         break;
+    case HUB75_I2S_CFG::DP3246_SM5368:
+        dp3246init(_cfg);
+        break;
     case HUB75_I2S_CFG::MBI5124:
         /* MBI5124 chips must be clocked with positive-edge, since it's LAT signal
         * resets on clock's rising edge while high
@@ -97,4 +100,76 @@ void MatrixPanel_I2S_DMA::fm6124init(const HUB75_I2S_CFG& _cfg) {
     gpio_set_level((gpio_num_t) _cfg.gpio.lat, LOW);
     gpio_set_level((gpio_num_t) _cfg.gpio.oe, LOW); // Enable Display
     CLK_PULSE
+}
+
+void MatrixPanel_I2S_DMA::dp3246init(const HUB75_I2S_CFG& _cfg) {
+
+    ESP_LOGI("LEDdrivers", "MatrixPanel_I2S_DMA - initializing DP3246 driver...");
+
+    // 15:13   3   000        reserved
+    // 12:9    4   0000       OE widening (= OE_ADD * 6ns)
+    // 8       1   0          reserved
+    // 7:0     8   11111111   Iout = (Igain+1)/256 * 17.6 / Rext
+    bool REG1[16] = { 0,0,0, 0,0,0,0, 0, 1,1,1,1,1,1,1,1 };  // MSB first
+
+    // 15:11   5   11111      Blanking potential selection, step 77mV, 00000: VDD-0.8V
+    // 10:8    3   111        Constant current source output inflection point selection
+    // 7       1   0          Disable dead pixel removel, 1: Enable
+    // 6       1   0          0->1: (OPEN_DET rising edge) start detection, 0: reset to ready-to-detect state
+    // 5       1   0          0: Enable black screen power saving, 1: Turn off the black screen to save energy
+    // 4       1   0          0: Do not enable the fading function, 1: Enable the fade function
+    // 3       1   0          Reserved
+    // 2:0     3   000        000: single edge pass, others: double edge transfer
+    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_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
+
+    // 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})
+            gpio_set_level((gpio_num_t)_pin, REG1[l % 16]);   // we have 16 bits shifters and write the same value all over the matrix array
+
+        if (l == PIXELS_PER_ROW - 11) {         // pull the latch 11 clocks before the end of matrix so that REG1 starts counting to save the value
+            gpio_set_level((gpio_num_t)_cfg.gpio.lat, HIGH);
+        }
+        CLK_PULSE
+    }
+
+    // drop the latch and save data to the REG1 all over the DP3246 chips
+    gpio_set_level((gpio_num_t)_cfg.gpio.lat, LOW);
+
+    // Send Data to control register REG2
+    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})
+            gpio_set_level((gpio_num_t)_pin, REG2[l % 16]);   // we have 16 bits shifters and we write the same value all over the matrix array
+
+        if (l == PIXELS_PER_ROW - 12) {       // pull the latch 12 clocks before the end of matrix so that REG2 starts counting to save the value
+            gpio_set_level((gpio_num_t)_cfg.gpio.lat, HIGH);
+        }
+        CLK_PULSE
+    }
+
+    // drop the latch and save data to the REG2 all over the DP3246 chips
+    gpio_set_level((gpio_num_t)_cfg.gpio.lat, LOW);
+    CLK_PULSE
+
+    // blank data regs to keep matrix clear after manipulations
+    for (uint8_t _pin : {_cfg.gpio.r1, _cfg.gpio.r2, _cfg.gpio.g1, _cfg.gpio.g2, _cfg.gpio.b1, _cfg.gpio.b2})
+        gpio_set_level((gpio_num_t)_pin, LOW);
+
+    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);
+    gpio_set_level((gpio_num_t)_cfg.gpio.oe, LOW); // enable Display
+    CLK_PULSE
 }
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