Merge pull request #126 from lucianomartin/feature/usb_str_cmds

Add new functions to read and write product and vendor strings

CHANGELOG.rst

@@ -20,7 +20,7 @@ lib_xua Change Log
   * CHANGE     HID report descriptor to use generic events instead of GPI
     events, to report Key-phrase detection as AC Search, and to report end-call
     detection as AC Stop
-  * ADDED:     Ability to read or modify vendor and product IDs
+  * ADDED:     Ability to read or modify vendor and product IDs and strings
   * ADDED:     Ability to read or modify bcdDevice
   * ADDED:     Override USB descriptor with sampling frequency and
     bit-resolution set at boot time.

lib_xua/api/xua_endpoint0.h

@@ -40,21 +40,73 @@ void XUA_Endpoint0_setVendorId(unsigned short vid);
 */
 void XUA_Endpoint0_setProductId(unsigned short pid);
 
-/** Function to get the Vendor ID value
- *
- *  \return Vendor ID value
-*/
-unsigned short XUA_Endpoint0_getVendorId();
 
-/** Function to get the Product ID value
+/** Function to set the Vendor string
  *
- *  \return Product ID value
+ *  \param vendor_str Vendor string to set
 */
-unsigned short XUA_Endpoint0_getProductId();
+#ifdef __XC__
+void XUA_Endpoint0_setVendorStr(char * unsafe vendor_str);
+#else
+void XUA_Endpoint0_setVendorStr(char * vendor_str);
+#endif
 
-unsigned short XUA_Endpoint0_getBcdDevice();
+/** Function to set the Product string
+ *
+ *  \param product_str Product string to set
+*/
+
+#ifdef __XC__
+void XUA_Endpoint0_setProductStr(char * unsafe product_str);
+#else
+void XUA_Endpoint0_setProductStr(char * product_str);
+#endif
+
+/** Function to set the BCD device
+ *
+ *  \param bcdDevice BCD device to set
+
+*/
 
 void XUA_Endpoint0_setBcdDevice(unsigned short bcdDevice);
 
+/** Function to get the Vendor string
+ *
+ *  \param vid vendor string
+*/
+#ifdef __XC__
+char * unsafe XUA_Endpoint0_getVendorStr();
+#else
+char *  XUA_Endpoint0_getVendorStr(;
+#endif
+
+/** Function to get the Product string
+ *
+ *  \param pid Product string
+*/
+#ifdef __XC__
+char * unsafe XUA_Endpoint0_getProductStr();
+#else
+char *  XUA_Endpoint0_getProductStr(;
+#endif
+
+/** Function to get the Vendor string
+ *
+ *  \return Vendor string
+*/
+unsigned short XUA_Endpoint0_getVendorId();
+
+/** Function to get the Product string
+ *
+ *  \return Product string
+*/
+unsigned short XUA_Endpoint0_getProductId();
+
+/** Function to get the BCD device
+ *
+ *  \return BCD device
+*/
+unsigned short XUA_Endpoint0_getBcdDevice();
+
 #endif
 #endif

lib_xua/src/core/endpoint0/xua_endpoint0.c

@@ -8,7 +8,7 @@
 #include <safestring.h>
 #include <stddef.h>
 #include <stdint.h>
-
+#include <string.h>
 #include "xua.h"
 
 #if XUA_USB_EN
@@ -28,6 +28,11 @@
 #if DSD_CHANS_DAC > 0
 #include "dsd_support.h"
 #endif
+#define DEBUG_UNIT XUA_EP0
+#ifndef DEBUG_PRINT_ENABLE_XUA_EP0
+    #define DEBUG_PRINT_ENABLE_XUA_EP0 0
+#endif // DEBUG_PRINT_ENABLE_XUA_EP0
+#include "debug_print.h"
 
 #include "xua_usb_params_funcs.h"
 
@@ -66,6 +71,9 @@ extern void device_reboot(void);
 #if( 0 < HID_CONTROLS )
 #include "xua_hid.h"
 #endif
+#ifndef MIN
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#endif
 
 unsigned int DFU_mode_active = 0;         // 0 - App active, 1 - DFU active
 
@@ -102,6 +110,13 @@ unsigned g_curStreamAlt_In = 0;
 /* Global variable for current USB bus speed (i.e. FS/HS) */
 XUD_BusSpeed_t g_curUsbSpeed = 0;
 
+/* Global variables for current USB Vendor and Product strings */
+char g_vendor_str[XUA_MAX_STR_LEN] = VENDOR_STR;
+#if (AUDIO_CLASS == 2)
+char g_product_str[XUA_MAX_STR_LEN] = PRODUCT_STR_A2;
+#else
+char g_product_str[XUA_MAX_STR_LEN] = PRODUCT_STR_A1;
+#endif
 
 /* Subslot */
 const unsigned g_subSlot_Out_HS[OUTPUT_FORMAT_COUNT]    = {HS_STREAM_FORMAT_OUTPUT_1_SUBSLOT_BYTES,
@@ -218,6 +233,82 @@ void XUA_Endpoint0_setVendorId(unsigned short vid) {
 #endif // AUDIO_CLASS == 1}
 }
 
+void concatenateAndCopyStrings(char* string1, char* string2, char* string_buffer) {
+    memset(string_buffer, '\0', strlen(string_buffer));
+
+    uint32_t remaining_buffer_size = MIN(strlen(string1), XUA_MAX_STR_LEN-1);
+    strncpy(string_buffer, string1, remaining_buffer_size);
+    uint32_t total_string_size = MIN(strlen(string1)+strlen(string2), XUA_MAX_STR_LEN-1);
+    if (total_string_size==XUA_MAX_STR_LEN-1) {
+        remaining_buffer_size =  XUA_MAX_STR_LEN-1-strlen(string1);
+    } else {
+        remaining_buffer_size = strlen(string1);
+    }
+    strncat(string_buffer, string2, remaining_buffer_size);
+}
+
+void XUA_Endpoint0_setStrTable() {
+
+    // update Vendor strings
+    concatenateAndCopyStrings(g_vendor_str, "", g_strTable.vendorStr);
+#if (AUDIO_CLASS == 2)
+    concatenateAndCopyStrings(g_vendor_str, " Clock Selector", g_strTable.clockSelectorStr);
+    concatenateAndCopyStrings(g_vendor_str, " Internal Clock", g_strTable.internalClockSourceStr);
+#endif
+#if SPDIF_RX
+    concatenateAndCopyStrings(g_vendor_str, " S/PDIF Clock", g_strTable.spdifClockSourceStr);
+#endif
+#if ADAT_RX
+    concatenateAndCopyStrings(g_vendor_str, " ADAT Clock", g_strTable.adatClockSourceStr);
+#endif
+#if (XUA_DFU_EN == 1)
+    concatenateAndCopyStrings(g_vendor_str, " DFU", g_strTable.dfuStr);
+#endif
+#ifdef USB_CONTROL_DESCS
+    concatenateAndCopyStrings(g_vendor_str, " Control", g_strTable.ctrlStr);
+#endif
+#ifdef MIDI
+    concatenateAndCopyStrings(g_vendor_str, " MIDI Out", g_strTable.midiOutStr);
+    concatenateAndCopyStrings(g_vendor_str, " MIDI In", g_strTable.midiInStr);
+#endif
+    // update product strings
+#if (AUDIO_CLASS_FALLBACK) || (AUDIO_CLASS == 1)
+    concatenateAndCopyStrings(g_product_str, "", g_strTable.productStr_Audio1);
+    concatenateAndCopyStrings(g_product_str, "", g_strTable.outputInterfaceStr_Audio1);
+    concatenateAndCopyStrings(g_product_str, "", g_strTable.inputInterfaceStr_Audio1);
+    concatenateAndCopyStrings(g_product_str, "", g_strTable.usbInputTermStr_Audio1);
+    concatenateAndCopyStrings(g_product_str, "", g_strTable.usbOutputTermStr_Audio1);
+#elif (AUDIO_CLASS == 2)
+    concatenateAndCopyStrings(g_product_str, "", g_strTable.productStr_Audio2);
+    concatenateAndCopyStrings(g_product_str, "", g_strTable.outputInterfaceStr_Audio2);
+    concatenateAndCopyStrings(g_product_str, "", g_strTable.inputInterfaceStr_Audio2);
+    concatenateAndCopyStrings(g_product_str, "", g_strTable.usbInputTermStr_Audio2);
+    concatenateAndCopyStrings(g_product_str, "", g_strTable.usbOutputTermStr_Audio2);
+#endif
+}
+
+void XUA_Endpoint0_setVendorStr(char* vendor_str) {
+    debug_printf("XUA_Endpoint0_setVendorStr() with string %s", vendor_str);
+    concatenateAndCopyStrings(vendor_str, "", g_vendor_str);
+}
+
+void XUA_Endpoint0_setProductStr(char* product_str) {
+    debug_printf("XUA_Endpoint0_setProductStr() with string %s", product_str);
+    concatenateAndCopyStrings(product_str, "", g_product_str);
+}
+
+char* XUA_Endpoint0_getVendorStr() {
+    return g_strTable.vendorStr;
+}
+
+char* XUA_Endpoint0_getProductStr() {
+    #if (AUDIO_CLASS_FALLBACK) || (AUDIO_CLASS == 1)
+    return g_strTable.productStr_Audio1;
+    #elif (AUDIO_CLASS == 2)
+    return g_strTable.productStr_Audio2;
+    #endif
+}
+
 void XUA_Endpoint0_setProductId(unsigned short pid) {
 #if (AUDIO_CLASS == 1)
     devDesc_Audio1.idProduct = pid;
@@ -270,6 +361,8 @@ void XUA_Endpoint0_init(chanend c_ep0_out, chanend c_ep0_in, chanend c_audioCont
     ep0_out = XUD_InitEp(c_ep0_out);
     ep0_in  = XUD_InitEp(c_ep0_in);
 
+    XUA_Endpoint0_setStrTable();
+
 #if 0
     /* Dont need to init globals.. */
     /* Init tables for volumes (+ 1 for master) */

lib_xua/src/core/endpoint0/xua_ep0_descriptors.h

@@ -26,7 +26,23 @@
 
 #define APPEND_PRODUCT_STR_A1(x) PRODUCT_STR_A1 " "#x
 
-#define STR_TABLE_ENTRY(name) char *name
+#define STR_TABLE_ENTRY(name) char * name
+
+// The empty strings below are used in the g_strTable to set the maximum size of the table entries
+// The last char of the strings are different, so that the compiler allocates separate memory spaces
+#define XUA_VENDOR_EMPTY_STRING "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\01"
+#define XUA_PRODUCT_EMPTY_STRING "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\02"
+#define XUA_CLOCK_SELECTOR_EMPTY_STRING "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\03"
+#define XUA_INTERNAL_CLOCK_SELECTOR_EMPTY_STRING "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\04"
+#define XUA_SPDIF_CLOCK_SOURCE_EMPTY_STRING "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\05"
+#define XUA_ADAT_CLOCK_SOURCE_EMPTY_STRING "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\06"
+#define XUA_DFU_EMPTY_STRING "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\07"
+#define XUA_CTRL_EMPTY_STRING "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\08"
+#define XUA_MIDI_OUT_EMPTY_STRING "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\09"
+#define XUA_MIDI_IN_EMPTY_STRING "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0a"
+
+// The value below must match the length of XUA_DESCR_EMPTY_STRING.
+#define XUA_MAX_STR_LEN (32)
 
 #define ISO_EP_ATTRIBUTES_ASYNCH                   0x05 //ISO, ASYNCH, DATA EP
 #define ISO_EP_ATTRIBUTES_ADAPTIVE                 0x09 //ISO, ADAPTIVE, DATA EP
@@ -317,41 +333,42 @@ typedef struct
 StringDescTable_t g_strTable =
 {
     .langID                      = "\x09\x04", /* US English */
-    .vendorStr                   = VENDOR_STR,
+    .vendorStr                   = XUA_VENDOR_EMPTY_STRING,
     .serialStr                   = "",
 #if (AUDIO_CLASS == 2)
-    .productStr_Audio2           = PRODUCT_STR_A2,
+    .productStr_Audio2           = XUA_PRODUCT_EMPTY_STRING,
-    .outputInterfaceStr_Audio2   = APPEND_PRODUCT_STR_A2(),
+    .outputInterfaceStr_Audio2   = XUA_PRODUCT_EMPTY_STRING,
-    .inputInterfaceStr_Audio2    = APPEND_PRODUCT_STR_A2(),
+    .inputInterfaceStr_Audio2    = XUA_PRODUCT_EMPTY_STRING,
-    .usbInputTermStr_Audio2      = APPEND_PRODUCT_STR_A2(),
+    .usbInputTermStr_Audio2      = XUA_PRODUCT_EMPTY_STRING,
-    .usbOutputTermStr_Audio2     = APPEND_PRODUCT_STR_A2(),
+    .usbOutputTermStr_Audio2     = XUA_PRODUCT_EMPTY_STRING,
 #endif
 #if (AUDIO_CLASS_FALLBACK) || (AUDIO_CLASS == 1)
-    .productStr_Audio1           = PRODUCT_STR_A1,
+
-    .outputInterfaceStr_Audio1   = APPEND_PRODUCT_STR_A1(),
+    .productStr_Audio1           = XUA_PRODUCT_EMPTY_STRING,
-    .inputInterfaceStr_Audio1    = APPEND_PRODUCT_STR_A1(),
+    .outputInterfaceStr_Audio1   = XUA_PRODUCT_EMPTY_STRING,
-    .usbInputTermStr_Audio1      = APPEND_PRODUCT_STR_A1(),
+    .inputInterfaceStr_Audio1    = XUA_PRODUCT_EMPTY_STRING,
-    .usbOutputTermStr_Audio1     = APPEND_PRODUCT_STR_A1(),
+    .usbInputTermStr_Audio1      = XUA_PRODUCT_EMPTY_STRING,
+    .usbOutputTermStr_Audio1     = XUA_PRODUCT_EMPTY_STRING,
 #endif
 #if (AUDIO_CLASS == 2)
-    .clockSelectorStr            = APPEND_VENDOR_STR(Clock Selector),
+    .clockSelectorStr            = XUA_CLOCK_SELECTOR_EMPTY_STRING,
-    .internalClockSourceStr      = APPEND_VENDOR_STR(Internal Clock),
+    .internalClockSourceStr      = XUA_INTERNAL_CLOCK_SELECTOR_EMPTY_STRING,
 #if SPDIF_RX
-    .spdifClockSourceStr         = APPEND_VENDOR_STR(S/PDIF Clock),
+    .spdifClockSourceStr         = XUA_SPDIF_CLOCK_SOURCE_EMPTY_STRING,
 #endif
 #if ADAT_RX
-    .adatClockSourceStr          = APPEND_VENDOR_STR(ADAT Clock),
+    .adatClockSourceStr          = XUA_ADAT_CLOCK_SOURCE_EMPTY_STRING,
 #endif
 #endif
 #if (XUA_DFU_EN == 1)
-    .dfuStr                      = APPEND_VENDOR_STR(DFU),
+    .dfuStr                      = XUA_DFU_EMPTY_STRING,
 #endif
 #ifdef USB_CONTROL_DESCS
-    .ctrlStr                      = APPEND_VENDOR_STR(Control),
+    .ctrlStr                      = XUA_CTRL_EMPTY_STRING,
 #endif
 #ifdef MIDI
-    .midiOutStr                   = APPEND_VENDOR_STR(MIDI Out),
+    .midiOutStr                   = XUA_MIDI_OUT_EMPTY_STRING,
-    .midiInStr                    = APPEND_VENDOR_STR(MIDI In),
+    .midiInStr                    = XUA_MIDI_IN_EMPTY_STRING,
 #endif
 
     #include "chanstrings.h"
@@ -2293,6 +2310,8 @@ unsigned char cfgDesc_Null[] =
  * To work around this we repeat MAX_FREQ_FS multiple times in some cases */
 
 #define MAX(a,b) (((a)>(b))?(a):(b))
+#define MIN(a,b) (((a)<(b))?(a):(b))
+
 const unsigned num_freqs_a1 = MAX(3, (0
 #if(MIN_FREQ <= 8000) && (MAX_FREQ_FS >= 8000)
     + 1