Initial test FW app for MIDI

tests/test_midi/src/app_midi_simple.xc

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+// Copyright 2017-2022 XMOS LIMITED.
+// This Software is subject to the terms of the XMOS Public Licence: Version 1.
+
+/* A very simple *example* of a USB audio application (and as such is un-verified for production)
+ *
+ * It uses the main blocks from the lib_xua
+ *
+ * - 2 channels out I2S only
+ * - No DFU
+ * - I2S only
+ *
+ */
+
+#include <xs1.h>
+#include <platform.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <xclib.h>
+
+#include "xua.h"
+#include "xud_device.h"
+#include "midiinparse.h"
+#include "midioutparse.h"
+
+on tile[MIDI_TILE] :  port p_midi_tx                        = XS1_PORT_4C;
+#if(MIDI_RX_PORT_WIDTH == 4)
+on tile[MIDI_TILE] :  buffered in port:4 p_midi_rx          = XS1_PORT_1F;
+#elif(MIDI_RX_PORT_WIDTH == 1)
+on tile[MIDI_TILE] :  buffered in port:1 p_midi_rx          = XS1_PORT_1F;
+#endif
+#define CLKBLK_MIDI  XS1_CLKBLK_2
+on tile[MIDI_TILE] : clock    clk_midi                      = CLKBLK_MIDI;
+
+
+/* Port declarations for I2C to config ADC's */
+on tile[0]: port p_scl = XS1_PORT_1L;
+on tile[0]: port p_sda = XS1_PORT_1M;
+
+/* See hwsupport.xc */
+void ctrlPort();
+
+#define CABLE_NUM   0
+
+#define NOTE_ON     0x90
+#define PITCH       60
+#define VELOCITY    80
+
+void test(chanend c_midi){
+    printf("Test\n");
+
+    struct midi_in_parse_state mips;
+    reset_midi_state(mips);
+
+    unsigned valid = 0;
+    unsigned tx_data = 0;
+    {valid, tx_data} = midi_in_parse(mips,CABLE_NUM, NOTE_ON);
+    printf("Valid: %d data: %u\n", valid, tx_data);
+    {valid, tx_data} = midi_in_parse(mips, CABLE_NUM, PITCH);
+    printf("Valid: %d data: %u\n", valid, tx_data);
+    {valid, tx_data} = midi_in_parse(mips, CABLE_NUM, VELOCITY);
+    printf("Valid: %d data: %u\n", valid, tx_data);
+
+
+    char midi[3];
+    unsigned size = 0;
+    {midi[0], midi[1], midi[2], size} = midi_out_parse(tx_data);
+    printf("size: %d data: 0x%x 0x%x 0x%x\n", size, midi[0], midi[1], midi[2]);
+
+
+    int is_ack;
+    unsigned int datum;
+
+    unsigned count = 0;
+    while(1){
+        select{
+            case midi_get_ack_or_data(c_midi, is_ack, datum):
+                printf("ACK: %d Datum: 0x%x\n", is_ack, datum);
+                count++;
+                if(count == 3){
+                    delay_microseconds(200); // Allow frame to complete
+                    exit(0);
+                }
+            break;
+
+            default:
+                outuint(c_midi,  byterev(tx_data));
+                printf("SEND TO MIDI\n");
+                delay_milliseconds(2); // 30 bits at 31.25 kbps is 0.96ms
+            break;
+        }
+    }
+
+}
+
+
+int main()
+{
+    chan c_midi;
+
+ 
+    par
+    {
+        on tile[0]: test(c_midi);
+        on tile[1]: usb_midi(p_midi_rx, p_midi_tx, clk_midi, c_midi, 0);
+
+
+        on tile[0]: ctrlPort();
+    }
+
+    return 0;
+}
+
+

tests/test_midi/src/hwsupport.xc

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+// Copyright 2017-2024 XMOS LIMITED.
+// This Software is subject to the terms of the XMOS Public Licence: Version 1.
+#include <xs1.h>
+#include <platform.h>
+#include "xua.h"
+
+
+on tile[0]: out port p_ctrl = XS1_PORT_8D;
+
+/* p_ctrl:
+ * [0:3] - Unused
+ * [4]   - EN_3v3_N
+ * [5]   - EN_3v3A
+ * [6]   - EXT_PLL_SEL (CS2100:0, SI: 1)
+ * [7]   - MCLK_DIR    (Out:0, In: 1)
+ */
+#define EXT_PLL_SEL__MCLK_DIR    (0x80)
+
+/* Note, this runs on Tile[0] */
+void ctrlPort()
+{
+    // Drive control port to turn on 3V3 and set MCLK_DIR
+    // Note, "soft-start" to reduce current spike
+    // Note, 3v3_EN is inverted
+    for (int i = 0; i < 30; i++)
+    {
+        p_ctrl <: EXT_PLL_SEL__MCLK_DIR | 0x30; /* 3v3: off, 3v3A: on */
+        delay_microseconds(5);
+        p_ctrl <: EXT_PLL_SEL__MCLK_DIR | 0x20; /* 3v3: on, 3v3A: on */
+        delay_microseconds(5);
+    }
+}
+
+/* Configures the external audio hardware at startup. Note this runs on Tile[1] */
+void AudioHwInit()
+{
+}
+
+/* Configures the external audio hardware for the required sample frequency */
+void AudioHwConfig(unsigned samFreq, unsigned mClk, unsigned dsdMode, unsigned sampRes_DAC, unsigned sampRes_ADC)
+{
+}
+

tests/test_midi/src/xua_conf.h

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+// Copyright 2017-2022 XMOS LIMITED.
+// This Software is subject to the terms of the XMOS Public Licence: Version 1.
+
+#ifndef _XUA_CONF_H_
+#define _XUA_CONF_H_
+
+#define NUM_USB_CHAN_OUT      2     /* Number of channels from host to device */
+#define NUM_USB_CHAN_IN       0     /* Number of channels from device to host */
+#define I2S_CHANS_DAC         2     /* Number of I2S channels out of xCORE */
+#define I2S_CHANS_ADC         0     /* Number of I2S channels in to xCORE */
+#define MCLK_441  (512 * 44100)     /* 44.1kHz family master clock frequency */
+#define MCLK_48   (512 * 48000)     /* 48kHz family master clock frequency */
+#define MIN_FREQ  48000             /* Minimum sample rate */
+#define MAX_FREQ  48000             /* Maximum sample rate */
+
+#define EXCLUDE_USB_AUDIO_MAIN
+
+#define MIDI            1
+#define MIDI_TILE       1
+#define VENDOR_STR      "XMOS"
+#define VENDOR_ID       0x20B1
+#define PRODUCT_STR_A2  "XUA Example"
+#define PRODUCT_STR_A1  "XUA Example"
+#define PID_AUDIO_1     1
+#define PID_AUDIO_2     2
+#define XUA_DFU_EN      0           /* Disable DFU (for simplicity of example */
+
+#endif

tests/test_midi/src/xud_conf.h

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+// Copyright 2017-2021 XMOS LIMITED.
+// This Software is subject to the terms of the XMOS Public Licence: Version 1.
+
+#include "xua_conf.h"
+
+/* TODO */
+#define XUD_UAC_NUM_USB_CHAN_OUT    NUM_USB_CHAN_OUT
+#define XUD_UAC_NUM_USB_CHAN_IN     NUM_USB_CHAN_IN