Support the display on the pyportal.

Also fix #1390, reload during sleep broken.

7 files changed, 106 insertions, 2 deletions

diff --git a/ports/atmel-samd/boards/pyportal/board.c b/ports/atmel-samd/boards/pyportal/board.c
index 7599f02b8..c361b5659 100644
--- a/ports/atmel-samd/boards/pyportal/board.c
+++ b/ports/atmel-samd/boards/pyportal/board.c
@@ -28,7 +28,85 @@
 #include "mpconfigboard.h"
 #include "hal/include/hal_gpio.h"
 
+#include "shared-bindings/displayio/FourWire.h"
+#include "shared-module/displayio/mipi_constants.h"
+
+#include "tick.h"
+
+displayio_fourwire_obj_t board_display_obj;
+
+#define DELAY 0x80
+
+uint8_t display_init_sequence[] = {
+    0xEF, 3, 0x03, 0x80, 0x02,
+    0xCF, 3, 0x00, 0xC1, 0x30,
+    0xED, 4, 0x64, 0x03, 0x12, 0x81,
+    0xE8, 3, 0x85, 0x00, 0x78,
+    0xCB, 5, 0x39, 0x2C, 0x00, 0x34, 0x02,
+    0xF7, 1, 0x20,
+    0xEA, 2, 0x00, 0x00,
+    0xc0, 1, 0x23,             // Power control VRH[5:0]
+    0xc1, 1, 0x10,             // Power control SAP[2:0];BT[3:0]
+    0xc5, 2, 0x3e, 0x28,       // VCM control
+    0xc7, 1, 0x86,             // VCM control2
+    0x36, 1, 0x48,             // Memory Access Control
+    0x37, 1, 0x00,             // Vertical scroll zero
+    0x3a, 1, 0x55,             // COLMOD: Pixel Format Set
+    0xb1, 2, 0x00, 0x18,       // Frame Rate Control (In Normal Mode/Full Colors)
+    0xb6, 3, 0x08, 0x82, 0x27, // Display Function Control
+    0xF2, 1, 0x00,                         // 3Gamma Function Disable
+    0x26, 1, 0x01,             // Gamma curve selected
+    0xe0, 15, 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, // Set Gamma
+      0x4E, 0xF1, 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00,
+    0xe1, 15, 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, // Set Gamma
+      0x31, 0xC1, 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F,
+    0x11, DELAY, 120,                // Exit Sleep
+    0x29, DELAY, 120, // Display on
+};
+
+
 void board_init(void) {
+    board_display_obj.base.type = &displayio_fourwire_type;
+    common_hal_displayio_fourwire_construct(&board_display_obj,
+        &pin_PA13, // Clock
+        &pin_PA12, // Data
+        &pin_PB09, // Command or data
+        &pin_PB06, // Chip select
+        &pin_PB05, // Reset
+        240, // Width
+        320, // Height
+        0, // column start
+        0, // row start
+        16, // Color depth
+        MIPI_COMMAND_SET_COLUMN_ADDRESS, // Set column command
+        MIPI_COMMAND_SET_PAGE_ADDRESS, // Set row command
+        MIPI_COMMAND_WRITE_MEMORY_START); // Write memory command
+
+    uint32_t i = 0;
+    common_hal_displayio_fourwire_begin_transaction(&board_display_obj);
+    while (i < sizeof(display_init_sequence)) {
+        uint8_t *cmd = display_init_sequence + i;
+        uint8_t data_size = *(cmd + 1);
+        bool delay = (data_size & DELAY) != 0;
+        data_size &= ~DELAY;
+        uint8_t *data = cmd + 2;
+        common_hal_displayio_fourwire_send(&board_display_obj, true, cmd, 1);
+        common_hal_displayio_fourwire_send(&board_display_obj, false, data, data_size);
+        if (delay) {
+            data_size++;
+            uint16_t delay_length_ms = *(cmd + 1 + data_size);
+            if (delay_length_ms == 255) {
+                delay_length_ms = 500;
+            }
+            uint64_t start = ticks_ms;
+            while (ticks_ms - start < delay_length_ms) {}
+        } else {
+            uint64_t start = ticks_ms;
+            while (ticks_ms - start < 10) {}
+        }
+        i += 2 + data_size;
+    }
+    common_hal_displayio_fourwire_end_transaction(&board_display_obj);
 }
 
 bool board_requests_safe_mode(void) {
@@ -36,4 +114,5 @@ bool board_requests_safe_mode(void) {
 }
 
 void reset_board(void) {
+    common_hal_displayio_fourwire_show(&board_display_obj, NULL);
 }
diff --git a/ports/atmel-samd/boards/pyportal/mpconfigboard.h b/ports/atmel-samd/boards/pyportal/mpconfigboard.h
index 16b104297..847e2ba76 100644
--- a/ports/atmel-samd/boards/pyportal/mpconfigboard.h
+++ b/ports/atmel-samd/boards/pyportal/mpconfigboard.h
@@ -38,3 +38,5 @@
 // USB is always used internally so skip the pin objects for it.
 #define IGNORE_PIN_PA24     1
 #define IGNORE_PIN_PA25     1
+
+#define CIRCUITPY_DISPLAYIO    (1)
diff --git a/ports/atmel-samd/boards/pyportal/pins.c b/ports/atmel-samd/boards/pyportal/pins.c
index 84ecbafff..7d4bc2a46 100644
--- a/ports/atmel-samd/boards/pyportal/pins.c
+++ b/ports/atmel-samd/boards/pyportal/pins.c
@@ -1,5 +1,6 @@
 #include "shared-bindings/board/__init__.h"
 
+#include "boards/board.h"
 #include "board_busses.h"
 
 // This mapping only includes functional names because pins broken
@@ -51,5 +52,7 @@ STATIC const mp_map_elem_t board_global_dict_table[] = {
 
     { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
     { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
+
+    { MP_ROM_QSTR(MP_QSTR_DISPLAY), MP_ROM_PTR(&board_display_obj)}
 };
 MP_DEFINE_CONST_DICT(board_module_globals, board_global_dict_table);
diff --git a/ports/atmel-samd/common-hal/displayio/FourWire.c b/ports/atmel-samd/common-hal/displayio/FourWire.c
index 6c3b75a85..b550f1c90 100644
--- a/ports/atmel-samd/common-hal/displayio/FourWire.c
+++ b/ports/atmel-samd/common-hal/displayio/FourWire.c
@@ -40,6 +40,8 @@ void common_hal_displayio_fourwire_construct(displayio_fourwire_obj_t* self,
     uint8_t set_column_command, uint8_t set_row_command, uint8_t write_ram_command) {
 
     common_hal_busio_spi_construct(&self->bus, clock, data, mp_const_none);
+    common_hal_busio_spi_never_reset(&self->bus);
+
     common_hal_digitalio_digitalinout_construct(&self->command, command);
     common_hal_digitalio_digitalinout_switch_to_output(&self->command, true, DRIVE_MODE_PUSH_PULL);
     common_hal_digitalio_digitalinout_construct(&self->chip_select, chip_select);
@@ -48,6 +50,10 @@ void common_hal_displayio_fourwire_construct(displayio_fourwire_obj_t* self,
     common_hal_digitalio_digitalinout_construct(&self->reset, reset);
     common_hal_digitalio_digitalinout_switch_to_output(&self->reset, true, DRIVE_MODE_PUSH_PULL);
 
+    never_reset_pin_number(command->number);
+    never_reset_pin_number(chip_select->number);
+    never_reset_pin_number(reset->number);
+
     self->width = width;
     self->height = height;
     self->color_depth = color_depth;
diff --git a/ports/atmel-samd/common-hal/microcontroller/__init__.c b/ports/atmel-samd/common-hal/microcontroller/__init__.c
index 0ca3a0835..d1d0eae8d 100644
--- a/ports/atmel-samd/common-hal/microcontroller/__init__.c
+++ b/ports/atmel-samd/common-hal/microcontroller/__init__.c
@@ -252,6 +252,18 @@ STATIC const mp_rom_map_elem_t mcu_pin_global_dict_table[] = {
 #if defined(PIN_PB17) && !defined(IGNORE_PIN_PB17)
     { MP_ROM_QSTR(MP_QSTR_PB17), MP_ROM_PTR(&pin_PB17) },
 #endif
+#if defined(PIN_PB18) && !defined(IGNORE_PIN_PB18)
+    { MP_ROM_QSTR(MP_QSTR_PB18), MP_ROM_PTR(&pin_PB18) },
+#endif
+#if defined(PIN_PB19) && !defined(IGNORE_PIN_PB19)
+    { MP_ROM_QSTR(MP_QSTR_PB19), MP_ROM_PTR(&pin_PB19) },
+#endif
+#if defined(PIN_PB20) && !defined(IGNORE_PIN_PB20)
+    { MP_ROM_QSTR(MP_QSTR_PB20), MP_ROM_PTR(&pin_PB20) },
+#endif
+#if defined(PIN_PB21) && !defined(IGNORE_PIN_PB21)
+    { MP_ROM_QSTR(MP_QSTR_PB21), MP_ROM_PTR(&pin_PB21) },
+#endif
 #if defined(PIN_PB22) && !defined(IGNORE_PIN_PB22)
     { MP_ROM_QSTR(MP_QSTR_PB22), MP_ROM_PTR(&pin_PB22) },
 #endif
diff --git a/ports/atmel-samd/mphalport.c b/ports/atmel-samd/mphalport.c
index ac5b0fbca..5c34a576a 100644
--- a/ports/atmel-samd/mphalport.c
+++ b/ports/atmel-samd/mphalport.c
@@ -57,7 +57,8 @@ void mp_hal_delay_ms(mp_uint_t delay) {
             MICROPY_VM_HOOK_LOOP
         #endif
         // Check to see if we've been CTRL-Ced by autoreload or the user.
-        if(MP_STATE_VM(mp_pending_exception) == MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception))) {
+        if(MP_STATE_VM(mp_pending_exception) == MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception)) ||
+           MP_STATE_VM(mp_pending_exception) == MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_reload_exception))) {
             break;
         }
         duration = (ticks_ms - start_tick);
diff --git a/ports/nrf/mphalport.c b/ports/nrf/mphalport.c
index 73f38bada..ea864e7ce 100644
--- a/ports/nrf/mphalport.c
+++ b/ports/nrf/mphalport.c
@@ -42,7 +42,8 @@ void mp_hal_delay_ms(mp_uint_t delay) {
             MICROPY_VM_HOOK_LOOP
         #endif
         // Check to see if we've been CTRL-Ced by autoreload or the user.
-        if(MP_STATE_VM(mp_pending_exception) == MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception))) {
+        if(MP_STATE_VM(mp_pending_exception) == MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception)) ||
+           MP_STATE_VM(mp_pending_exception) == MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_reload_exception))) {
             break;
         }
         duration = (ticks_ms - start_tick);