3 files changed, 20 insertions, 11 deletions
diff --git a/software/rda1846dongle/rda1846.c b/software/rda1846dongle/rda1846.c
index 9f8f356..3b89f2a 100644
--- a/software/rda1846dongle/rda1846.c
+++ b/software/rda1846dongle/rda1846.c
@@ -142,8 +142,8 @@ void rda1846_reg_init(void)
 //  rda1846_write_register(RDA1846_REG_TX_VOICE, RDA1846_TX_VOICE_TONE2);
 //  rda1846_write_register(RDA1846_REG_DTMF_T2, 6689);
 
-//  rda1846_write_register(RDA1846_REG_DTMF_CTL, RDA1846_DTMF_DUAL | RDA1846_DTMF_EN);
-//  rda1846_write_register(RDA1846_REG_INT, RDA1846_INT_DTMF_IDLE);
+  rda1846_write_register(RDA1846_REG_DTMF_CTL, RDA1846_DTMF_DUAL | RDA1846_DTMF_EN);
+  rda1846_write_register(RDA1846_REG_INT, RDA1846_INT_DTMF_IDLE);
 
   rda1846_gpio_default();
 }
@@ -299,17 +299,23 @@ uint16_t rda1846_get_flags(void)
   return data & 0x1687;
 }
 
-uint8_t rda1846_get_dtmf(uint8_t* idx1, uint8_t* idx2, uint8_t* code)
+uint16_t rda1846_get_dtmf(uint8_t* idx1, uint8_t* idx2, uint8_t* code, uint8_t* valid)
 {
   uint16_t data;
   if(rda1846_read_register(RDA1846_REG_DTMF_OUT, &data))
-    return 1;
+    return 0xFFFF;
 
-  if(idx1) *idx1 = (uint8_t)((data & 0x0380)>>7);
-  if(idx2) *idx2 = (uint8_t)((data & 0x0070)>>4);
+  if(idx1) *idx1 = (uint8_t)((data & 0x0700)>>8);
+  if(idx2) *idx2 = (uint8_t)((data & 0x00E0)>>5);
   if(code) *code = (uint8_t)(data & 0x000F);
+  if(valid) *valid = data & 0x0010 ? 0 : 1;
 
-  return 0;
+  return data;
+}
+
+void rda1846_clear_int(void)
+{
+  rda1846_write_register(0x00, 0x1846);
 }
 
 int32_t rda1846_get_freq_kHz(void)
diff --git a/software/rda1846dongle/rda1846.h b/software/rda1846dongle/rda1846.h
index 7e22a7e..35246cb 100644
--- a/software/rda1846dongle/rda1846.h
+++ b/software/rda1846dongle/rda1846.h
@@ -57,7 +57,8 @@ void rda1846_gpio_off(void);
 int16_t rda1846_get_rssi(void);
 int16_t rda1846_get_vssi(void);
 uint16_t rda1846_get_flags(void);
-uint8_t rda1846_get_dtmf(uint8_t*, uint8_t*, uint8_t*);
+uint16_t rda1846_get_dtmf(uint8_t*, uint8_t*, uint8_t*, uint8_t*);
+void rda1846_clear_int(void);
 
 int32_t rda1846_get_freq_kHz(void);
 uint8_t rda1846_set_freq_kHz(int32_t freq);
diff --git a/software/rda1846dongle/rda1846dongle.c b/software/rda1846dongle/rda1846dongle.c
index d6f1b85..94f4b26 100644
--- a/software/rda1846dongle/rda1846dongle.c
+++ b/software/rda1846dongle/rda1846dongle.c
@@ -156,11 +156,13 @@ static void print_status(void)
 
 static void print_dtmf(void)
 {
-  uint8_t idx1, idx2, code;
-  if(rda1846_get_dtmf(&idx1, &idx2, &code))
+  uint8_t idx1, idx2, code, valid;
+  uint16_t raw = rda1846_get_dtmf(&idx1, &idx2, &code, &valid);
+  if(raw == 0xFFFF)
     printf("DTMF: ERROR\r\n");
   else
-    printf("DTMF: tone1=%d, tone2=%d, code=0x%02X\r\n", idx1, idx2, code);
+    printf("DTMF: raw=0x%04X, tone1=%d, tone2=%d, code=0x%02X, valid=%d\r\n", raw, idx1, idx2, code, valid);
+  rda1846_clear_int();
 }