start work on fruitjam

README-fruitjam.md

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+# Adafruit Fruit Jam (work in progress)
+
+ * `git submodule update --init`
+ * `sh fruitjam_build.sh`
+ * `picotool uf2 convert doom1.whx -t bin doom1-whx-for-doom_tiny.uf2 -o 0x10040000 --family data`
+
+You will get binary files including `build_fruitjam/src/doom_tiny.uf2`.
+
+Copy the uf2s (I copied `doom1-whx-for-doom_tiny.uf2` first then `build_fruitjam/src/doom_tiny.uf2`) to fruit jam.
+You may need to re-enter the bootloader after copying the first file. (TODO: how do you combine UF2 files)
+
+You should get:
+ * Debug UART output on pin "A4"
+ * video data on pin 8, sync on 6/7 (I expected data on 9/10 as well but there's not: It's supposed to be 1-bit RGB)
+ * Audio (soundtrack + FX) on I2S
+
+TODO:
+ * HSTX video
+ * Pico-PIO-USB for input
+ * combined UF2 files

fruitjam-build.sh

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+#!/bin/sh
+TAG=fruitjam
+export CFLAGS="-include $(pwd)/fruitjam_cflags.h"
+export CXXFLAGS="-include $(pwd)/fruitjam_cflags.h"
+cmake -S . -B build_${TAG} \
+    -DCMAKE_BUILD_TYPE=MinSizeRel \
+    -DPICO_SDK_PATH=../pico-sdk \
+    -DPICOTOOL_FETCH_FROM_GIT_PATH="$(pwd)/picotool" \
+    -DBOARD=adafruit_fruit_jam -DPICO_BOARD=adafruit_fruit_jam \
+    -DUSE_HSTX=1 \
+    ${CMAKE_ARGS} "$@"
+
+make -C build_${TAG} -j$(nproc)

fruitjam_cflags.h

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+#ifndef FRUITJAM_CFLAGS_H
+#define FRUITJAM_CFLAGS_H 1
+#define PICO_SCANVIDEO_COLOR_PIN_BASE 8
+#define PICO_SCANVIDEO_PIXEL_RCOUNT 1
+#define PICO_SCANVIDEO_PIXEL_GCOUNT 1
+#define PICO_SCANVIDEO_PIXEL_BCOUNT 1
+#define PICO_SCANVIDEO_SYNC_PIN_BASE 6
+#define USE_HSTX 1
+#define SD_TX 35
+#define SD_RX 36
+#define SD_SCK 34
+#define SD_CS 39
+#define USE_SD 1
+#define PICO_DEFAULT_UART 0
+#define PICO_DEFAULT_UART_TX_PIN 44
+#define PICO_DEFAULT_UART_RX_PIN 45
+#define PICO_AUDIO_I2S_DATA_PIN 24
+#define PICO_AUDIO_I2S_CLOCK_PIN_BASE 26
+#define HSTX_CKP 11
+#define HSTX_D0P 13
+#define HSTX_D1P 15
+#define HSTX_D2P 17
+#define SD_MHZ 16
+#endif