Started work on test util to dump adc samps over USB

git-svn-id: https://svn.code.sf.net/p/freetel/code@2830 01035d8c-6547-0410-b346-abe4f91aad63

diff --git a/codec2-dev/stm32/src/sm2000_adc_dump.c b/codec2-dev/stm32/src/sm2000_adc_dump.c
new file mode 100644 (file)
index 0000000..f08fb9c
--- /dev/null
+++ b/codec2-dev/stm32/src/sm2000_adc_dump.c
@@ -0,0 +1,106 @@
+/*---------------------------------------------------------------------------*\
+
+  FILE........: sm2000_stw.c
+  AUTHOR......: David Rowe
+  DATE CREATED: June 2016
+
+  Test program to support SM2000 "set to work" - tetsing and bring up.
+
+\*---------------------------------------------------------------------------*/
+
+/*
+  Copyright (C) 2016 David Rowe
+
+  All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License version 2.1, as
+  published by the Free Software Foundation.  This program is
+  distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+  License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <assert.h>
+#include "new_i2c.h"
+#include "si53xx.h"
+#include "debugblinky.h"
+#include "sm1000_leds_switches.h"
+#include "stm32f4_dac.h"
+#include "stm32f4_adc.h"
+#include "stm32f4_usb_vcp.h"
+
+#define SINE_SAMPLES   24
+
+/* 32 sample sine wave which at Fs=16kHz will be 500Hz.  Note samples
+   are 16 bit 2's complement, the DAC driver convertsto 12 bit
+   unsigned. */
+
+short aSine[] = {
+     5000,  -2500,  -2500, 5000,  -2500,  -2500, 
+     5000,  -2500,  -2500, 5000,  -2500,  -2500, 
+     5000,  -2500,  -2500, 5000,  -2500,  -2500, 
+     5000,  -2500,  -2500, 5000,  -2500,  -2500
+};
+short zeros[SINE_SAMPLES];
+
+int main(void) {
+    int ret, ptt, i;
+    uint64_t freq_in_Hz_times_100;
+
+    for(i=0; i<SINE_SAMPLES; i++)
+        aSine[i] *= 1.5;
+
+    sm1000_leds_switches_init();
+    led_pwr(1);
+    led_ptt(0);
+
+    init_debug_blinky();
+    txrx_12V(0);
+
+    I2C_Setup();
+    si5351_init(0, SI5351_CRYSTAL_LOAD_6PF, 0);
+    freq_in_Hz_times_100 = 1070000000ULL - 3200000ULL;
+    ret = si5351_set_freq(freq_in_Hz_times_100, 0, SI5351_CLK0);
+
+    dac_open(DAC_FS_96KHZ, 4*DAC_BUF_SZ);
+
+    usb_vcp_init();
+
+    while(1) {
+        ptt = switch_ptt();
+        led_ptt(ptt);
+        txrx_12V(ptt);
+
+        /*
+        if (ptt)
+            dac1_write((short*)aSine, SINE_SAMPLES);
+        else
+            dac1_write((short*)zeros, SINE_SAMPLES);
+        */
+
+        /* read another buffer from USB when DAC empties */
+        /* note assumes USB host write two bytes at a time */
+        /* and assumes enough bytes are available, need to test that
+           host is throttled appropriately */
+
+        int n = dac1_free();
+        if (n) {
+            uint16_t  s, buf[n];
+            uint8_t   b;
+            for(i=0; i<n; i++) {
+                //VCP_get_char(&b);
+                s = b << 8;
+                //VCP_get_char(&b);
+                s += b;
+                buf[i] = s;
+            }
+            dac1_write((short*)buf, n);
+        }
+                
+    }
+}