.github/workflows/build.yaml

@@ -37,8 +37,6 @@ jobs:
           ./fetch-rom-dsk.sh
           ./fruitjam-build.sh -m 4096
           ./fruitjam-build.sh -m 4096 -v
-          ./fruitjam-build.sh -m 4096 -o
-          ./fruitjam-build.sh -m 4096 -v -o
           ./fruitjam-build.sh -m 400
           ./fruitjam-build.sh -m 400 -v
           ./fruitjam-build.sh -m 400 -o

CMakeLists.txt

@@ -179,7 +179,7 @@ if (USE_AUDIO)
    add_subdirectory(external/pico-extras/src/rp2_common/pico_audio_i2s)
    add_subdirectory(external/pico-extras/src/common/pico_audio)
    add_subdirectory(external/pico-extras/src/common/pico_util_buffer)
-   add_compile_definitions(ENABLE_AUDIO=1 PICO_AUDIO_I2S_PIO=1 PICO_AUDIO_I2S_DMA_IRQ=0 PICO_AUDIO_I2S_DATA_PIN=24 PICO_AUDIO_I2S_CLOCK_PIN_BASE=26 PICO_AUDIO_I2S_MONO_INPUT=1)
+   add_compile_definitions(ENABLE_AUDIO=1 PICO_AUDIO_I2S_CLOCK_PINS_SWAPPED=1 PICO_AUDIO_I2S_PIO=1 PICO_AUDIO_I2S_DMA_IRQ=0 PICO_AUDIO_I2S_DATA_PIN=24 PICO_AUDIO_I2S_CLOCK_PIN_BASE=25 PICO_AUDIO_I2S_MONO_INPUT=1 PICO_AUDIO_I2S_SWAP_CLOCK=1)
    set(EXTRA_AUDIO_LIB pico_util_buffer pico_audio pico_audio_i2s hardware_i2c)
 endif()
 

external/umac

@@ -1 +1 @@
-Subproject commit c265fb4e1eaaaed15776ac97f5b16a56cf5c454d
+Subproject commit 431e905354e975cd942eb4c1c5ea5a39237691ab

fetch-rom-dsk.sh

@@ -2,11 +2,12 @@
 set -xe
 
 if ! [ -f rom.bin ]; then
-    curl -L 'https://archive.org/download/mac_rom_archive_-_as_of_8-19-2011/mac_rom_archive_-_as_of_8-19-2011.zip/4D1F8172%20-%20MacPlus%20v3.ROM' > rom.bin
+    curl -L 'https://ia902205.us.archive.org/view_archive.php?archive=/18/items/mac_rom_archive_-_as_of_8-19-2011/mac_rom_archive_-_as_of_8-19-2011.zip&file=4D1F8172%20-%20MacPlus%20v3.ROM' > rom.bin
 fi
 
 if ! [ -f umac0ro.img ]; then
-    curl -L 'https://archive.org/download/mac_MacOS_6.0.8/MacOS_6.0.8_System_Startup.img' > 'umac0ro.img'
+    if ! [ -f os.7z ]; then
+        curl -L 'https://archive.org/download/apple-mac-os-system-3.2-finder-5.3-system-tools-1.0-512-ke-jun-1986-3.5-800k.-7z/Apple%20Mac%20OS%20%28System%203.2%20Finder%205.3%29%20%28System%20Tools%201.0%20Mac%20128%2C%20512K%29%20%28Jun%201986%29%20%283.5-400k%29.7z' > 'os.7z'
+    fi
+    7z x -so 'os.7z' 'Apple Mac OS (System 3.2 Finder 5.3) (System Tools 1.0 Mac 128, 512K) (Jun 1986) (3.5-400k)/System Installation.img' > umac0ro.img
 fi
-
-sha256sum -c roms.sha256sum

roms.sha256sum

@@ -1,2 +0,0 @@
-dd908e2b65772a6b1f0c859c24e9a0d3dcde17b1c6a24f4abd8955846d7895e7 *rom.bin
-464ff9b8a55b0a8fe10d394b411f9c753fcd9d477c0d2f1118ce9927b19bee54 *umac0ro.img

src/clocking.c

@@ -30,12 +30,8 @@ static void __no_inline_not_in_flash_func(set_qmi_timing)() {
 #define RP2350_PSRAM_MIN_DESELECT_FS (50000000)
 #endif
 
-#ifndef RP2350_PSRAM_RX_DELAY_FS
-#define RP2350_PSRAM_RX_DELAY_FS (3333333)
-#endif
-
 #ifndef RP2350_PSRAM_MAX_SCK_HZ
-#define RP2350_PSRAM_MAX_SCK_HZ (133000000)
+#define RP2350_PSRAM_MAX_SCK_HZ (109000000)
 #endif
 
 #define SEC_TO_FS 1000000000000000ll
@@ -53,7 +49,6 @@ static void __no_inline_not_in_flash_func(set_psram_timing)(void) {
     // Get the clock femto seconds per cycle.
 
     uint32_t fsPerCycle = SEC_TO_FS / sysHz;
-    uint32_t fsPerHalfCycle = fsPerCycle / 2;
 
     // the maxSelect value is defined in units of 64 clock cycles
     // So maxFS / (64 * fsPerCycle) = maxSelect = RP2350_PSRAM_MAX_SELECT_FS64/fsPerCycle
@@ -65,18 +60,11 @@ static void __no_inline_not_in_flash_func(set_psram_timing)(void) {
 
     volatile uint8_t minDeselect = (RP2350_PSRAM_MIN_DESELECT_FS + fsPerCycle - 1) / fsPerCycle;
 
-    // RX delay (RP2350 datasheet 12.14.3.1) delay between between rising edge of SCK and
-    // the start of RX sampling. Expressed in 0.5 system clock cycles. Smallest value
-    // >= 3.3ns.
-    volatile uint8_t rxDelay = (RP2350_PSRAM_RX_DELAY_FS + fsPerHalfCycle - 1) / fsPerHalfCycle;
-
     printf("syshz=%u\n", sysHz);
-    printf("Max Select: %d, Min Deselect: %d, RX delay: %d, clock divider: %d\n", maxSelect, minDeselect, rxDelay, clockDivider);
-    printf("PSRAM clock rate %.1fMHz\n", (float)sysHz / clockDivider / 1e6);
+    printf("Max Select: %d, Min Deselect: %d, clock divider: %d\n", maxSelect, minDeselect, clockDivider);
 
     qmi_hw->m[1].timing = QMI_M1_TIMING_PAGEBREAK_VALUE_1024 << QMI_M1_TIMING_PAGEBREAK_LSB | // Break between pages.
                           3 << QMI_M1_TIMING_SELECT_HOLD_LSB | // Delay releasing CS for 3 extra system cycles.
-                          rxDelay << QMI_M1_TIMING_RXDELAY_LSB | // Delay between SCK and RX sampling
                           1 << QMI_M1_TIMING_COOLDOWN_LSB | 1 << QMI_M1_TIMING_RXDELAY_LSB |
                           maxSelect << QMI_M1_TIMING_MAX_SELECT_LSB | minDeselect << QMI_M1_TIMING_MIN_DESELECT_LSB |
                           clockDivider << QMI_M1_TIMING_CLKDIV_LSB;
@@ -154,6 +142,10 @@ void overclock(enum clk_sys_speed clk_sys_div, uint32_t bit_clk_khz) {
 	stdio_init_all();
     set_psram_timing();
 #define SHOW_CLK(i) printf("clk_get_hz(%s) -> %u\n", #i, clock_get_hz(i));
+        SHOW_CLK(clk_gpout0);
+        SHOW_CLK(clk_gpout1);
+        SHOW_CLK(clk_gpout2);
+        SHOW_CLK(clk_gpout3);
         SHOW_CLK(clk_ref);
         SHOW_CLK(clk_sys);
         SHOW_CLK(clk_peri);

src/main.c

@@ -403,25 +403,14 @@ static void __no_inline_not_in_flash_func(setup_psram)(void) {
     }
 
     // RESETEN, RESET and quad enable
-    for (uint8_t i = 0; i < 4; i++) {
+    for (uint8_t i = 0; i < 3; i++) {
         qmi_hw->direct_csr |= QMI_DIRECT_CSR_ASSERT_CS1N_BITS;
-        switch (i) {
-            case 0:
-                // RESETEN
+        if (i == 0) {
             qmi_hw->direct_tx = 0x66;
-                break;
-            case 1:
-                // RESET
+        } else if (i == 1) {
             qmi_hw->direct_tx = 0x99;
-                break;
-            case 2:
-                // Quad enable
+        } else {
             qmi_hw->direct_tx = 0x35;
-                break;
-            case 3:
-                // Toggle wrap boundary mode
-                qmi_hw->direct_tx = 0xc0;
-                break;
         }
         while ((qmi_hw->direct_csr & QMI_DIRECT_CSR_BUSY_BITS) != 0) {
         }
@@ -491,41 +480,28 @@ static void __no_inline_not_in_flash_func(setup_psram)(void) {
 
 int     main()
 {
-        setup_psram();
-#if OVERCLOCK
+#if defined(OVERCLOCK) && OVERCLOCK+0
         overclock(CLK_SYS_264MHZ, 252000);
 #endif
+        // set_sys_clock_khz(250*1000, true);
+
+        setup_psram();
+
 	stdio_init_all();
-
-printf("psram size %u\n", _psram_size);
-
-#ifndef RAM_TEST
-#define RAM_TEST (0)
-#endif
-
-#if RAM_TEST
-for(int pass=0; pass<10; pass++) {
-    uint8_t acc = 1;
-    for(int i=0; i < _psram_size; i++) {
-        umac_ram[i] = acc;
-        acc = acc * 13 + 21;
-    }
-
-    acc = 1;
-    for(int i=0; i < _psram_size; i++) {
-        uint8_t ri = umac_ram[i];
-        if(ri != acc) {
-            panic("[%08x] Stored %02x read %02x", i, acc, ri);
-        }
-        acc = acc * 13 + 21;
-    }
-
-    printf("ram test pass %d OK\n", pass);
-}
-#endif
-
         io_init();
 
+#define SHOW_CLK(i) printf("clk_get_hz(%s) -> %u\n", #i, clock_get_hz(i));
+        SHOW_CLK(clk_gpout0);
+        SHOW_CLK(clk_gpout1);
+        SHOW_CLK(clk_gpout2);
+        SHOW_CLK(clk_gpout3);
+        SHOW_CLK(clk_ref);
+        SHOW_CLK(clk_sys);
+        SHOW_CLK(clk_peri);
+        SHOW_CLK(clk_hstx);
+        SHOW_CLK(clk_usb);
+        SHOW_CLK(clk_adc);
+
 #if ENABLE_AUDIO
         audio_setup();
 #endif