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Code Issues Releases Activity

implement Wire.end() for SAM core

Browse Source 
also moved common reset and disable code in libsam TWI_ConfigureMaster
and TWI_ConfigureSlave functions to new TWI_Disable function, which is
used in TwoWire::end()
This commit is contained in:
Sandeep Mistry 2015-08-26 15:13:59 -04:00
parent f5c1084f5f
commit 2737305f54
6 changed files with 68 additions and 51 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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@ -126,6 +126,10 @@ void TwoWire::begin(int address) {
begin((uint8_t) address);
}
void TwoWire::end(void) {
TWI_Disable(twi);
}
void TwoWire::setClock(uint32_t frequency) {
twiClock = frequency;
TWI_SetClock(twi, twiClock, VARIANT_MCK);

4
hardware/arduino/sam/libraries/Wire/Wire.h
View File

@ -29,12 +29,16 @@
#define BUFFER_LENGTH 32
// WIRE_HAS_END means Wire has end()
#define WIRE_HAS_END 1
class TwoWire : public Stream {
public:
TwoWire(Twi *twi, void(*begin_cb)(void));
void begin();
void begin(uint8_t);
void begin(int);
void end();
void setClock(uint32_t);
void beginTransmission(uint8_t);
void beginTransmission(int);

2
hardware/arduino/sam/system/libsam/include/twi.h
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@ -71,6 +71,8 @@ extern void TWI_SetClock( Twi *pTwi, uint32_t dwTwCk, uint32_t dwMCk );
extern void TWI_ConfigureSlave(Twi *pTwi, uint8_t slaveAddress);
extern void TWI_Disable(Twi *pTwi);
extern void TWI_Stop(Twi *pTwi);
extern void TWI_StartRead(

38
hardware/arduino/sam/system/libsam/source/twi.c
View File

@ -100,13 +100,8 @@ void TWI_ConfigureMaster( Twi* pTwi, uint32_t dwTwCk, uint32_t dwMCk )
/* SVEN: TWI Slave Mode Enabled */
pTwi->TWI_CR = TWI_CR_SVEN ;
/* Reset the TWI */
pTwi->TWI_CR = TWI_CR_SWRST ;
pTwi->TWI_RHR ;
/* TWI Slave Mode Disabled, TWI Master Mode Disabled. */
pTwi->TWI_CR = TWI_CR_SVDIS ;
pTwi->TWI_CR = TWI_CR_MSDIS ;
TWI_Disable(pTwi);
/* Set master mode */
pTwi->TWI_CR = TWI_CR_MSEN ;
@ -156,15 +151,7 @@ void TWI_ConfigureSlave(Twi *pTwi, uint8_t slaveAddress)
{
uint32_t i;
/* TWI software reset */
pTwi->TWI_CR = TWI_CR_SWRST;
pTwi->TWI_RHR;
/* Wait at least 10 ms */
for (i=0; i < 1000000; i++);
/* TWI Slave Mode Disabled, TWI Master Mode Disabled*/
pTwi->TWI_CR = TWI_CR_SVDIS | TWI_CR_MSDIS;
TWI_Disable(pTwi);
/* Configure slave address. */
pTwi->TWI_SMR = 0;
@ -178,6 +165,27 @@ void TWI_ConfigureSlave(Twi *pTwi, uint8_t slaveAddress)
assert( (pTwi->TWI_CR & TWI_CR_SVDIS)!= TWI_CR_SVDIS ) ;
}
/**
* \brief Disables the TWI.
* \param pTwi Pointer to an Twi instance.
*/
void TWI_Disable(Twi *pTwi)
{
assert( pTwi ) ;
uint32_t i;
/* TWI software reset */
pTwi->TWI_CR = TWI_CR_SWRST;
pTwi->TWI_RHR;
/* Wait at least 10 ms */
for (i=0; i < 1000000; i++);
/* TWI Slave Mode Disabled, TWI Master Mode Disabled*/
pTwi->TWI_CR = TWI_CR_SVDIS | TWI_CR_MSDIS;
}
/**
* \brief Sends a STOP condition on the TWI.
* \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.

71
hardware/arduino/sam/variants/arduino_due_x/libsam_sam3x8e_gcc_rel.a.txt
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@ -72,7 +72,6 @@ pmc.o:
00000000 T pmc_switch_udpck_to_upllck
pwmc.o:
00000000 r C.9.8054
00000000 t FindClockConfiguration
00000000 T PWMC_ConfigureChannel
00000000 T PWMC_ConfigureChannelExt
@ -100,14 +99,14 @@ pwmc.o:
00000000 T PWMC_SetSyncChannelUpdateUnlock
00000000 T PWMC_WriteBuffer
U __assert_func
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
00000000 r __func__.6793
00000000 r __func__.6804
00000000 r __func__.6819
00000000 r __func__.6830
00000000 r __func__.6841
00000000 r __func__.6848
00000000 r __func__.6932
00000000 r __func__.6938
rtc.o:
00000000 T RTC_ClearSCCR
@ -123,9 +122,9 @@ rtc.o:
00000000 T RTC_SetTime
00000000 T RTC_SetTimeAlarm
U __assert_func
00000000 r __func__.6632
00000000 r __func__.6641
00000000 r __func__.6646
00000000 r __func__.6790
00000000 r __func__.6799
00000000 r __func__.6804
rtt.o:
00000000 T RTT_EnableIT
@ -134,8 +133,8 @@ rtt.o:
00000000 T RTT_SetAlarm
00000000 T RTT_SetPrescaler
U __assert_func
00000000 r __func__.6639
00000000 r __func__.6647
00000000 r __func__.6797
00000000 r __func__.6805
spi.o:
00000000 T SPI_Configure
@ -161,9 +160,9 @@ tc.o:
00000000 T TC_Start
00000000 T TC_Stop
U __assert_func
00000000 r __func__.6634
00000000 r __func__.6640
00000000 r __func__.6646
00000000 r __func__.6792
00000000 r __func__.6798
00000000 r __func__.6804
timetick.o:
00000000 T GetTickCount
@ -178,6 +177,7 @@ twi.o:
00000000 T TWI_ByteSent
00000000 T TWI_ConfigureMaster
00000000 T TWI_ConfigureSlave
00000000 T TWI_Disable
00000000 T TWI_DisableIt
00000000 T TWI_EnableIt
00000000 T TWI_GetMaskedStatus
@ -191,19 +191,20 @@ twi.o:
00000000 T TWI_TransferComplete
00000000 T TWI_WriteByte
U __assert_func
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
00000000 r __func__.7151
00000000 r __func__.7157
00000000 r __func__.7172
00000000 r __func__.7176
00000000 r __func__.7184
00000000 r __func__.7191
00000000 r __func__.7195
00000000 r __func__.7200
00000000 r __func__.7208
00000000 r __func__.7222
00000000 r __func__.7227
00000000 r __func__.7231
00000000 r __func__.7236
00000000 r __func__.7240
usart.o:
00000000 T USART_Configure
@ -222,7 +223,7 @@ usart.o:
00000000 T USART_Write
00000000 T USART_WriteBuffer
U __assert_func
00000000 r __func__.6928
00000000 r __func__.7068
wdt.o:
00000000 T WDT_Disable
@ -300,7 +301,6 @@ startup_sam3xa.o:
U main
adc.o:
00000000 r C.0.8146
00000000 T adc_configure_power_save
00000000 T adc_configure_sequence
00000000 T adc_configure_timing
@ -485,12 +485,12 @@ efc.o:
00000000 T efc_get_wait_state
00000000 T efc_init
00000000 T efc_perform_command
00000070 T efc_perform_fcr
0000006c T efc_perform_fcr
00000000 T efc_perform_read_sequence
00000000 T efc_set_flash_access_mode
00000000 T efc_set_wait_state
0000006c T efc_write_fmr
00000000 b iap_perform_command.6909
00000068 T efc_write_fmr
00000000 b iap_perform_command.7049
gpbr.o:
00000000 T gpbr_read
@ -568,7 +568,6 @@ emac.o:
00000000 T emac_phy_write
00000000 t emac_reset_rx_mem
00000000 t emac_reset_tx_mem
00000000 t emac_wait_phy.clone.1
00000000 b gs_rx_desc
00000000 b gs_tx_callback
00000000 b gs_tx_desc