Added some utility functions in libsam for TC. (Neil H.)

Author: cmaglie

hardware/arduino/sam/system/libsam/include/tc.h

@@ -68,6 +68,10 @@ extern void TC_Stop( Tc *pTc, uint32_t dwChannel ) ;
 
 extern uint32_t TC_FindMckDivisor( uint32_t dwFreq, uint32_t dwMCk, uint32_t *dwDiv, uint32_t *dwTcClks, uint32_t dwBoardMCK ) ;
 
+extern uint32_t TC_ReadCV(Tc *p_tc, uint32_t ul_channel);
+
+extern uint32_t TC_GetStatus(Tc *p_tc, uint32_t ul_channel);
+
 extern void TC_SetRA(Tc *tc, uint32_t chan, uint32_t v) ;
 
 extern void TC_SetRB(Tc *tc, uint32_t chan, uint32_t v) ;

hardware/arduino/sam/system/libsam/source/tc.c

@@ -173,14 +173,63 @@ extern uint32_t TC_FindMckDivisor( uint32_t dwFreq, uint32_t dwMCk, uint32_t *dw
     return 1 ;
 }
 
+/**
+ * \brief Read Timer Counter Counter Value on the selected TC & channel.
+ *
+ * \param p_tc Pointer to a TC instance.
+ * \param ul_channel Channel to configure.
+ *
+ * \return RC value.
+ */
+uint32_t TC_ReadCV(Tc *p_tc, uint32_t ul_channel){
+	return p_tc->TC_CHANNEL[ul_channel].TC_CV;
+}
+
+/**
+ * \brief Get current status on the selected channel.
+ *
+ * \param p_tc Pointer to a TC instance.
+ * \param ul_channel Channel to configure.
+ *
+ * \return The current TC status.
+ */
+uint32_t TC_GetStatus(Tc *p_tc, uint32_t ul_channel)
+{
+	TcChannel *tc_channel;
+
+	tc_channel = p_tc->TC_CHANNEL + ul_channel;
+	return tc_channel->TC_SR;
+}
+
+/**
+ * \brief Set RA on the selected channel.
+ *
+ * \param tc Pointer to a TC instance.
+ * \param chan Channel to configure.
+ * \param v New value for RA.
+ */
 void TC_SetRA(Tc *tc, uint32_t chan, uint32_t v) {
 	tc->TC_CHANNEL[chan].TC_RA = v;
 }
 
+/**
+ * \brief Set RB on the selected channel.
+ *
+ * \param tc Pointer to a TC instance.
+ * \param chan Channel to configure.
+ * \param v New value for RB.
+ */
 void TC_SetRB(Tc *tc, uint32_t chan, uint32_t v) {
 	tc->TC_CHANNEL[chan].TC_RB = v;
 }
 
+/**
+ * \brief Set RC on the selected channel.
+ *
+ * \param tc Pointer to a TC instance.
+ * \param chan Channel to configure.
+ * \param v New value for RC.
+ */
 void TC_SetRC(Tc *tc, uint32_t chan, uint32_t v) {
 	tc->TC_CHANNEL[chan].TC_RC = v;
 }

hardware/arduino/sam/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a

@@ -72,7 +72,7 @@ pmc.o:
 00000000 T pmc_switch_udpck_to_upllck
 
 pwmc.o:
-00000000 r C.9.7272
+00000000 r C.9.7280
 00000000 t FindClockConfiguration
 00000000 T PWMC_ConfigureChannel
 00000000 T PWMC_ConfigureChannelExt
@@ -100,14 +100,14 @@ pwmc.o:
 00000000 T PWMC_SetSyncChannelUpdateUnlock
 00000000 T PWMC_WriteBuffer
          U __assert_func
-00000000 r __func__.5968
-00000000 r __func__.5979
-00000000 r __func__.5994
-00000000 r __func__.6005
-00000000 r __func__.6016
-00000000 r __func__.6023
-00000000 r __func__.6107
+00000000 r __func__.5974
+00000000 r __func__.5985
+00000000 r __func__.6000
+00000000 r __func__.6011
+00000000 r __func__.6022
+00000000 r __func__.6029
 00000000 r __func__.6113
+00000000 r __func__.6119
 
 rtc.o:
 00000000 T RTC_ClearSCCR
@@ -123,9 +123,9 @@ rtc.o:
 00000000 T RTC_SetTime
 00000000 T RTC_SetTimeAlarm
          U __assert_func
-00000000 r __func__.5965
-00000000 r __func__.5974
-00000000 r __func__.5979
+00000000 r __func__.5971
+00000000 r __func__.5980
+00000000 r __func__.5985
 
 rtt.o:
 00000000 T RTT_EnableIT
@@ -134,8 +134,8 @@ rtt.o:
 00000000 T RTT_SetAlarm
 00000000 T RTT_SetPrescaler
          U __assert_func
-00000000 r __func__.5972
-00000000 r __func__.5980
+00000000 r __func__.5978
+00000000 r __func__.5986
 
 spi.o:
 00000000 T SPI_Configure
@@ -153,15 +153,17 @@ spi.o:
 tc.o:
 00000000 T TC_Configure
 00000000 T TC_FindMckDivisor
+00000000 T TC_GetStatus
+00000000 T TC_ReadCV
 00000000 T TC_SetRA
 00000000 T TC_SetRB
 00000000 T TC_SetRC
 00000000 T TC_Start
 00000000 T TC_Stop
          U __assert_func
-00000000 r __func__.5967
 00000000 r __func__.5973
 00000000 r __func__.5979
+00000000 r __func__.5985
 
 timetick.o:
 00000000 T GetTickCount
@@ -188,18 +190,18 @@ twi.o:
 00000000 T TWI_TransferComplete
 00000000 T TWI_WriteByte
          U __assert_func
-00000000 r __func__.6340
-00000000 r __func__.6355
-00000000 r __func__.6359
-00000000 r __func__.6366
-00000000 r __func__.6370
-00000000 r __func__.6375
-00000000 r __func__.6383
-00000000 r __func__.6397
-00000000 r __func__.6402
-00000000 r __func__.6406
-00000000 r __func__.6411
-00000000 r __func__.6415
+00000000 r __func__.6346
+00000000 r __func__.6361
+00000000 r __func__.6365
+00000000 r __func__.6372
+00000000 r __func__.6376
+00000000 r __func__.6381
+00000000 r __func__.6389
+00000000 r __func__.6403
+00000000 r __func__.6408
+00000000 r __func__.6412
+00000000 r __func__.6417
+00000000 r __func__.6421
 
 usart.o:
 00000000 T USART_Configure
@@ -218,7 +220,7 @@ usart.o:
 00000000 T USART_Write
 00000000 T USART_WriteBuffer
          U __assert_func
-00000000 r __func__.6261
+00000000 r __func__.6267
 
 wdt.o:
 00000000 T WDT_Disable