Merge pull request #5 from visrealm/dev

v0.4.0

Author: visrealm

CMakeLists.txt

@@ -10,6 +10,9 @@ set(BUILD_SHARED_LIBS OFF)
 
 set(PROJECT pico9918)
 
+set(PICO_BOARD_HEADER_DIRS ${CMAKE_CURRENT_LIST_DIR}/src/boards )
+set(PICO_BOARD "pico9918_v04")
+
 project(${PROJECT} C CXX)
 
 add_definitions(-DPICO_BUILD=1)

src/boards/pico9918_v04.h

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+// -----------------------------------------------------
+// NOTE: THIS HEADER IS ALSO INCLUDED BY ASSEMBLER SO
+//       SHOULD ONLY CONSIST OF PREPROCESSOR DIRECTIVES
+// -----------------------------------------------------
+
+// This header may be included by other board headers as "boards/pico.h"
+
+#ifndef _BOARDS_PICO_H
+#define _BOARDS_PICO_H
+
+// For board detection
+#define PICO9918
+
+#ifndef PICO_XOSC_STARTUP_DELAY_MULTIPLIER
+#define PICO_XOSC_STARTUP_DELAY_MULTIPLIER 32
+#endif
+
+// --- UART ---
+#ifndef PICO_DEFAULT_UART
+#define PICO_DEFAULT_UART 0
+#endif
+#ifndef PICO_DEFAULT_UART_TX_PIN
+#define PICO_DEFAULT_UART_TX_PIN 0
+#endif
+#ifndef PICO_DEFAULT_UART_RX_PIN
+#define PICO_DEFAULT_UART_RX_PIN 1
+#endif
+
+// --- LED ---
+#ifndef PICO_DEFAULT_LED_PIN
+#define PICO_DEFAULT_LED_PIN 25
+#endif
+// no PICO_DEFAULT_WS2812_PIN
+
+// --- I2C ---
+#ifndef PICO_DEFAULT_I2C
+#define PICO_DEFAULT_I2C 0
+#endif
+#ifndef PICO_DEFAULT_I2C_SDA_PIN
+#define PICO_DEFAULT_I2C_SDA_PIN 4
+#endif
+#ifndef PICO_DEFAULT_I2C_SCL_PIN
+#define PICO_DEFAULT_I2C_SCL_PIN 5
+#endif
+
+// --- SPI ---
+#ifndef PICO_DEFAULT_SPI
+#define PICO_DEFAULT_SPI 0
+#endif
+#ifndef PICO_DEFAULT_SPI_SCK_PIN
+#define PICO_DEFAULT_SPI_SCK_PIN 18
+#endif
+#ifndef PICO_DEFAULT_SPI_TX_PIN
+#define PICO_DEFAULT_SPI_TX_PIN 19
+#endif
+#ifndef PICO_DEFAULT_SPI_RX_PIN
+#define PICO_DEFAULT_SPI_RX_PIN 16
+#endif
+#ifndef PICO_DEFAULT_SPI_CSN_PIN
+#define PICO_DEFAULT_SPI_CSN_PIN 17
+#endif
+
+// --- FLASH ---
+
+#define PICO_BOOT_STAGE2_CHOOSE_W25Q080 1
+
+#ifndef PICO_FLASH_SPI_CLKDIV
+#define PICO_FLASH_SPI_CLKDIV 2
+#endif
+
+#ifndef PICO_FLASH_SIZE_BYTES
+#define PICO_FLASH_SIZE_BYTES (2 * 1024 * 1024)
+#endif
+
+// Drive high to force power supply into PWM mode (lower ripple on 3V3 at light loads)
+#define PICO_SMPS_MODE_PIN 23
+
+#ifndef PICO_RP2040_B0_SUPPORTED
+#define PICO_RP2040_B0_SUPPORTED 1
+#endif
+
+// The GPIO Pin used to read VBUS to determine if the device is battery powered.
+#ifndef PICO_VBUS_PIN
+#define PICO_VBUS_PIN 24
+#endif
+
+// The GPIO Pin used to monitor VSYS. Typically you would use this with ADC.
+// There is an example in adc/read_vsys in pico-examples.
+#ifndef PICO_VSYS_PIN
+#define PICO_VSYS_PIN 29
+#endif
+
+#endif

src/main.c

@@ -63,7 +63,7 @@
   */
 
 #define PCB_MAJOR_VERSION 0
-#define PCB_MINOR_VERSION 3
+#define PCB_MINOR_VERSION 4
 
 #define GPIO_CD0 14
 #define GPIO_CSR tmsRead_CSR_PIN  // defined in tms9918.pio
@@ -105,7 +105,9 @@
 #define TMS_IRQ PIO1_IRQ_0
 
 
-  /* file globals */
+
+
+/* file globals */
 
 static uint8_t nextValue = 0;     /* TMS9918A read-ahead value */
 static bool currentInt = false;   /* current interrupt state */
@@ -191,7 +193,6 @@ static inline void disableTmsPioInterrupts()
   __dmb();
 }
 
-
 /*
  * generate a single VGA scanline (called by vgaLoop(), runs on proc1)
  */
@@ -211,6 +212,9 @@ static void __time_critical_func(tmsScanline)(uint16_t y, VgaParams* params, uin
   const uint32_t vBorder = (VIRTUAL_PIXELS_Y - TMS9918_PIXELS_Y) / 2;
   const uint32_t hBorder = (VIRTUAL_PIXELS_X - TMS9918_PIXELS_X * 2) / 2;
 
+  static int frameCount = 0;
+  static int logoOffset = 100;
+
   uint16_t bg = tms9918PaletteBGR12[vrEmuTms9918RegValue(TMS_REG_FG_BG_COLOR) & 0x0f];
 
   /*** top and bottom borders ***/
@@ -226,24 +230,37 @@ static void __time_critical_func(tmsScanline)(uint16_t y, VgaParams* params, uin
      *       : 430 bytes
      * format: 16-bit abgr palette, 2bpp indexed image
      */
-    if (y >= vBorder + TMS9918_PIXELS_Y + 12)
+    if (frameCount < 600)
     {
-      y -= vBorder + TMS9918_PIXELS_Y + 12;
-      if (y < splashHeight)
+      if (y == 0)
+      {
+        ++frameCount;
+        if (frameCount & 0x01)
+        {
+          if (frameCount < 200 && logoOffset > 12) --logoOffset;
+          else if (frameCount > 500) ++logoOffset;
+        }
+      }
+
+      if (y < (VIRTUAL_PIXELS_Y - 1))
       {
-        uint8_t* splashPtr = splash + (y * splashWidth / 4);
-        for (int x = 4; x < 4 + splashWidth; x += 4)
+        y -= vBorder + TMS9918_PIXELS_Y + logoOffset;
+        if (y < splashHeight)
         {
-          uint8_t c = *(splashPtr++);
-          uint8_t p0 = (c & 0xc0);
-          uint8_t p1 = (c & 0x30);
-          uint8_t p2 = (c & 0x0c);
-          uint8_t p3 = (c & 0x03);
-
-          if (p0) { pixels[x] = splash_pal[(p0 >> 6)]; }
-          if (p1) { pixels[x + 1] = splash_pal[(p1 >> 4)]; }
-          if (p2) { pixels[x + 2] = splash_pal[(p2 >> 2)]; }
-          if (p3) { pixels[x + 3] = splash_pal[p3]; }
+          uint8_t* splashPtr = splash + (y * splashWidth / 4);
+          for (int x = 4; x < 4 + splashWidth; x += 4)
+          {
+            uint8_t c = *(splashPtr++);
+            uint8_t p0 = (c & 0xc0);
+            uint8_t p1 = (c & 0x30);
+            uint8_t p2 = (c & 0x0c);
+            uint8_t p3 = (c & 0x03);
+
+            if (p0) { pixels[x] = splash_pal[(p0 >> 6)]; }
+            if (p1) { pixels[x + 1] = splash_pal[(p1 >> 4)]; }
+            if (p2) { pixels[x + 2] = splash_pal[(p2 >> 2)]; }
+            if (p3) { pixels[x + 3] = splash_pal[p3]; }
+          }
         }
       }
     }
@@ -348,6 +365,9 @@ uint initClock(uint gpio, float freqHz)
  */
 void tmsPioInit()
 {
+  irq_set_exclusive_handler(TMS_IRQ, pio_irq_handler);
+  irq_set_enabled(TMS_IRQ, true);
+
   uint tmsWriteProgram = pio_add_program(TMS_PIO, &tmsWrite_program);
 
   pio_sm_config writeConfig = tmsWrite_program_get_default_config(tmsWriteProgram);
@@ -357,6 +377,7 @@ void tmsPioInit()
 
   pio_sm_init(TMS_PIO, tmsWriteSm, tmsWriteProgram, &writeConfig);
   pio_sm_set_enabled(TMS_PIO, tmsWriteSm, true);
+  pio_set_irq0_source_enabled(TMS_PIO, pis_sm0_rx_fifo_not_empty, true);
 
   uint tmsReadProgram = pio_add_program(TMS_PIO, &tmsRead_program);
 
@@ -375,9 +396,6 @@ void tmsPioInit()
 
   pio_sm_init(TMS_PIO, tmsReadSm, tmsReadProgram, &readConfig);
   pio_sm_set_enabled(TMS_PIO, tmsReadSm, true);
-  irq_set_exclusive_handler(TMS_IRQ, pio_irq_handler);
-  irq_set_enabled(TMS_IRQ, true);
-  pio_set_irq0_source_enabled(TMS_PIO, pis_sm0_rx_fifo_not_empty, true);
   pio_set_irq0_source_enabled(TMS_PIO, pis_sm1_rx_fifo_not_empty, true);
 
   pio_sm_put(TMS_PIO, tmsReadSm, 0x000000ff);
@@ -406,7 +424,6 @@ void proc1Entry()
 }
 
 
-
 /*
  * main entry point
  */
@@ -438,10 +455,10 @@ int main(void)
   vgaInit(params);
 
   /* signal proc1 that we're ready to start the display */
-  multicore_fifo_push_timeout_us(0, 0);
+  multicore_fifo_push_blocking(0);
 
   /* twiddle our thumbs - everything from this point on
-     is handled by interrupts and PIOs */
+     is handled by interrupts and PIOs */;
   while (1)
   {
     tight_loop_contents();

src/res/splash.png

@@ -1,17 +1,5 @@
-set(PROGRAM pico9918test)
+cmake_minimum_required(VERSION 3.12)
 
-add_executable(${PROGRAM})
-
-# generate image array source files from png images
-visrealm_generate_bindata_source(${PROGRAM} breakout res/BREAKOUT.* )
-
-pico_generate_pio_header(${PROGRAM} ${CMAKE_CURRENT_LIST_DIR}/clocks.pio)
-
-target_sources(${PROGRAM} PRIVATE test.c font.c)
-
-pico_add_extra_outputs(${PROGRAM})
-
-target_link_libraries(${PROGRAM} PUBLIC
-        pico_stdlib
-        hardware_pio)
+add_subdirectory(host)
+#add_subdirectory(qc)
 

submodules/vrEmuTms9918

@@ -0,0 +1,17 @@
+set(PROGRAM pico9918test)
+
+add_executable(${PROGRAM})
+
+# generate image array source files from png images
+visrealm_generate_bindata_source(${PROGRAM} breakout res/BREAKOUT.* )
+
+pico_generate_pio_header(${PROGRAM} ${CMAKE_CURRENT_LIST_DIR}/clocks.pio)
+
+target_sources(${PROGRAM} PRIVATE test.c font.c)
+
+pico_add_extra_outputs(${PROGRAM})
+
+target_link_libraries(${PROGRAM} PUBLIC
+        pico_stdlib
+        hardware_pio)
+

test/CMakeLists.txt

@@ -1,35 +1,35 @@
-/*
- * Project: pico9918
- *
- * Copyright (c) 2024 Troy Schrapel
- *
- * This code is licensed under the MIT license
- *
- * https://github.com/visrealm/pico9918
- *
- */
-
-.program clock
-    pull block
-.wrap_target
-    set pins, 1
-    mov x, osr
-onDelay:
-    jmp x-- onDelay
-    set pins, 0
-    mov x, osr
-offDelay:
-    jmp x-- offDelay
-.wrap
-
-
-% c-sdk {
-
-void clock_program_init(PIO pio, uint sm, uint offset, uint pin) {
-  pio_gpio_init(pio, pin);
-  pio_sm_set_consecutive_pindirs(pio, sm, pin, 1, true);
-  pio_sm_config c = clock_program_get_default_config(offset);
-  sm_config_set_set_pins(&c, pin, 1);
-  pio_sm_init(pio, sm, offset, &c);
-}
-%}
+/*
+ * Project: pico9918
+ *
+ * Copyright (c) 2024 Troy Schrapel
+ *
+ * This code is licensed under the MIT license
+ *
+ * https://github.com/visrealm/pico9918
+ *
+ */
+
+.program clock
+    pull block
+.wrap_target
+    set pins, 1
+    mov x, osr
+onDelay:
+    jmp x-- onDelay
+    set pins, 0
+    mov x, osr
+offDelay:
+    jmp x-- offDelay
+.wrap
+
+
+% c-sdk {
+
+void clock_program_init(PIO pio, uint sm, uint offset, uint pin) {
+  pio_gpio_init(pio, pin);
+  pio_sm_set_consecutive_pindirs(pio, sm, pin, 1, true);
+  pio_sm_config c = clock_program_get_default_config(offset);
+  sm_config_set_set_pins(&c, pin, 1);
+  pio_sm_init(pio, sm, offset, &c);
+}
+%}