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Due: Wire.setClock can be called at any time 

See #2157
This commit is contained in:
Cristian Maglie 2014-07-06 00:36:22 +02:00
parent 9d20959b6a
commit 75ec6a1b31
6 changed files with 53 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
hardware/arduino/sam/libraries/Wire/Wire.cpp
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@ -95,8 +95,7 @@ static inline bool TWI_STATUS_NACK(uint32_t status) {
TwoWire::TwoWire(Twi *_twi, void(*_beginCb)(void)) :
twi(_twi), rxBufferIndex(0), rxBufferLength(0), txAddress(0),
txBufferLength(0), srvBufferIndex(0), srvBufferLength(0), status(
UNINITIALIZED), onBeginCallback(_beginCb) {
setClock(100000); // Set clock frequency to 100000 Hz
UNINITIALIZED), onBeginCallback(_beginCb), twiClock(TWI_CLOCK) {
}
void TwoWire::begin(void) {
@ -129,6 +128,7 @@ void TwoWire::begin(int address) {
void TwoWire::setClock(uint32_t frequency) {
twiClock = frequency;
TWI_SetClock(twi, twiClock, VARIANT_MCK);
}
uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity, uint8_t sendStop) {

1
hardware/arduino/sam/libraries/Wire/Wire.h
View File

@ -100,6 +100,7 @@ private:
TwoWireStatus status;
// TWI clock frequency
static const uint32_t TWI_CLOCK = 100000;
uint32_t twiClock;
// Timeouts (

2
hardware/arduino/sam/system/libsam/include/twi.h
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@ -67,6 +67,8 @@
extern void TWI_ConfigureMaster(Twi *pTwi, uint32_t twck, uint32_t mck);
extern void TWI_SetClock( Twi *pTwi, uint32_t dwTwCk, uint32_t dwMCk );
extern void TWI_ConfigureSlave(Twi *pTwi, uint8_t slaveAddress);
extern void TWI_Stop(Twi *pTwi);

18
hardware/arduino/sam/system/libsam/source/twi.c
View File

@ -96,10 +96,6 @@
*/
void TWI_ConfigureMaster( Twi* pTwi, uint32_t dwTwCk, uint32_t dwMCk )
{
uint32_t dwCkDiv = 0 ;
uint32_t dwClDiv ;
uint32_t dwOk = 0 ;
assert( pTwi ) ;
/* SVEN: TWI Slave Mode Enabled */
@ -115,6 +111,19 @@ void TWI_ConfigureMaster( Twi* pTwi, uint32_t dwTwCk, uint32_t dwMCk )
/* Set master mode */
pTwi->TWI_CR = TWI_CR_MSEN ;
/* Configure clock */
TWI_SetClock(pTwi, dwTwCk, dwMCk);
}
void TWI_SetClock( Twi *pTwi, uint32_t dwTwCk, uint32_t dwMCk )
{
assert( pTwi ) ;
uint32_t dwCkDiv = 0 ;
uint32_t dwClDiv ;
uint32_t dwOk = 0 ;
/* Configure clock */
while ( !dwOk )
{
@ -137,6 +146,7 @@ void TWI_ConfigureMaster( Twi* pTwi, uint32_t dwTwCk, uint32_t dwMCk )
pTwi->TWI_CWGR = (dwCkDiv << 16) | (dwClDiv << 8) | dwClDiv ;
}
/**
* \brief Configures a TWI peripheral to operate in slave mode.
* \param pTwi Pointer to an Twi instance.

BIN
hardware/arduino/sam/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a
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Binary file not shown.

66
hardware/arduino/sam/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a.txt
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@ -72,7 +72,7 @@ pmc.o:
00000000 T pmc_switch_udpck_to_upllck
pwmc.o:
00000000 r C.9.8049
00000000 r C.9.8054
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__.6631
00000000 r __func__.6642
00000000 r __func__.6657
00000000 r __func__.6668
00000000 r __func__.6679
00000000 r __func__.6686
00000000 r __func__.6770
00000000 r __func__.6776
00000000 r __func__.6635
00000000 r __func__.6646
00000000 r __func__.6661
00000000 r __func__.6672
00000000 r __func__.6683
00000000 r __func__.6690
00000000 r __func__.6774
00000000 r __func__.6780
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__.6628
00000000 r __func__.6637
00000000 r __func__.6642
00000000 r __func__.6632
00000000 r __func__.6641
00000000 r __func__.6646
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__.6635
00000000 r __func__.6643
00000000 r __func__.6639
00000000 r __func__.6647
spi.o:
00000000 T SPI_Configure
@ -161,9 +161,9 @@ tc.o:
00000000 T TC_Start
00000000 T TC_Stop
U __assert_func
00000000 r __func__.6630
00000000 r __func__.6636
00000000 r __func__.6642
00000000 r __func__.6634
00000000 r __func__.6640
00000000 r __func__.6646
timetick.o:
00000000 T GetTickCount
@ -184,24 +184,26 @@ twi.o:
00000000 T TWI_GetStatus
00000000 T TWI_ReadByte
00000000 T TWI_SendSTOPCondition
00000000 T TWI_SetClock
00000000 T TWI_StartRead
00000000 T TWI_StartWrite
00000000 T TWI_Stop
00000000 T TWI_TransferComplete
00000000 T TWI_WriteByte
U __assert_func
00000000 r __func__.7003
00000000 r __func__.7018
00000000 r __func__.7022
00000000 r __func__.7029
00000000 r __func__.7033
00000000 r __func__.7038
00000000 r __func__.7046
00000000 r __func__.7060
00000000 r __func__.7065
00000000 r __func__.7069
00000000 r __func__.7074
00000000 r __func__.7078
00000000 r __func__.7004
00000000 r __func__.7010
00000000 r __func__.7028
00000000 r __func__.7032
00000000 r __func__.7039
00000000 r __func__.7043
00000000 r __func__.7048
00000000 r __func__.7056
00000000 r __func__.7070
00000000 r __func__.7075
00000000 r __func__.7079
00000000 r __func__.7084
00000000 r __func__.7088
usart.o:
00000000 T USART_Configure
@ -220,7 +222,7 @@ usart.o:
00000000 T USART_Write
00000000 T USART_WriteBuffer
U __assert_func
00000000 r __func__.6924
00000000 r __func__.6928
wdt.o:
00000000 T WDT_Disable
@ -298,7 +300,7 @@ startup_sam3xa.o:
U main
adc.o:
00000000 r C.0.8141
00000000 r C.0.8146
00000000 T adc_configure_power_save
00000000 T adc_configure_sequence
00000000 T adc_configure_timing
@ -488,7 +490,7 @@ efc.o:
00000000 T efc_set_flash_access_mode
00000000 T efc_set_wait_state
0000006c T efc_write_fmr
00000000 b iap_perform_command.6905
00000000 b iap_perform_command.6909
gpbr.o:
00000000 T gpbr_read