123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738 |
- #include "gd32f30x_i2c.h"
- #define I2C_ERROR_HANDLE(s) do{}while(1)
- #define I2CCLK_MAX ((uint32_t)0x0000003CU)
- #define I2CCLK_MIN ((uint32_t)0x00000002U)
- #define I2C_FLAG_MASK ((uint32_t)0x0000FFFFU)
- #define I2C_ADDRESS_MASK ((uint32_t)0x000003FFU)
- #define I2C_ADDRESS2_MASK ((uint32_t)0x000000FEU)
- #define STAT1_PECV_OFFSET ((uint32_t)0x00000008U)
- void i2c_deinit(uint32_t i2c_periph)
- {
- switch(i2c_periph){
- case I2C0:
-
- rcu_periph_reset_enable(RCU_I2C0RST);
- rcu_periph_reset_disable(RCU_I2C0RST);
- break;
- case I2C1:
-
- rcu_periph_reset_enable(RCU_I2C1RST);
- rcu_periph_reset_disable(RCU_I2C1RST);
- break;
- default:
- break;
- }
- }
- void i2c_clock_config(uint32_t i2c_periph, uint32_t clkspeed, uint32_t dutycyc)
- {
- uint32_t pclk1, clkc, freq, risetime;
- uint32_t temp;
-
-
- if(0U == clkspeed){
- I2C_ERROR_HANDLE("the parameter can not be 0 \r\n");
- }
-
- pclk1 = rcu_clock_freq_get(CK_APB1);
-
- freq = (uint32_t)(pclk1/1000000U);
- if(freq >= I2CCLK_MAX){
- freq = I2CCLK_MAX;
- }
- temp = I2C_CTL1(i2c_periph);
- temp &= ~I2C_CTL1_I2CCLK;
- temp |= freq;
-
- I2C_CTL1(i2c_periph) = temp;
-
- if(100000U >= clkspeed){
-
- risetime = (uint32_t)((pclk1/1000000U)+1U);
- if(risetime >= I2CCLK_MAX){
- I2C_RT(i2c_periph) = I2CCLK_MAX;
- }else if(risetime <= I2CCLK_MIN){
- I2C_RT(i2c_periph) = I2CCLK_MIN;
- }else{
- I2C_RT(i2c_periph) = risetime;
- }
- clkc = (uint32_t)(pclk1/(clkspeed*2U));
- if(clkc < 0x04U){
-
- clkc = 0x04U;
- }
- I2C_CKCFG(i2c_periph) |= (I2C_CKCFG_CLKC & clkc);
- }else if(400000U >= clkspeed){
-
- I2C_RT(i2c_periph) = (uint32_t)(((freq*(uint32_t)300U)/(uint32_t)1000U)+(uint32_t)1U);
- if(I2C_DTCY_2 == dutycyc){
-
- clkc = (uint32_t)(pclk1/(clkspeed*3U));
- I2C_CKCFG(i2c_periph) &= ~I2C_CKCFG_DTCY;
- }else{
-
- clkc = (uint32_t)(pclk1/(clkspeed*25U));
- I2C_CKCFG(i2c_periph) |= I2C_CKCFG_DTCY;
- }
- if(0U == (clkc & I2C_CKCFG_CLKC)){
-
- clkc |= 0x0001U;
- }
- I2C_CKCFG(i2c_periph) |= I2C_CKCFG_FAST;
- I2C_CKCFG(i2c_periph) |= clkc;
- }else{
-
- I2C_RT(i2c_periph) = (uint32_t)(((freq*(uint32_t)120U)/(uint32_t)1000U)+(uint32_t)1U);
- if(I2C_DTCY_2 == dutycyc){
-
- clkc = (uint32_t)(pclk1/(clkspeed*3U));
- I2C_CKCFG(i2c_periph) &= ~I2C_CKCFG_DTCY;
- }else{
-
- clkc = (uint32_t)(pclk1/(clkspeed*25U));
- I2C_CKCFG(i2c_periph) |= I2C_CKCFG_DTCY;
- }
-
- I2C_CKCFG(i2c_periph) |= I2C_CKCFG_FAST;
- I2C_CKCFG(i2c_periph) |= clkc;
-
- I2C_FMPCFG(i2c_periph) = I2C_FMPCFG_FMPEN;
- }
- }
- void i2c_mode_addr_config(uint32_t i2c_periph, uint32_t mode, uint32_t addformat, uint32_t addr)
- {
-
- uint32_t ctl = 0U;
- ctl = I2C_CTL0(i2c_periph);
- ctl &= ~(I2C_CTL0_SMBEN);
- ctl |= mode;
- I2C_CTL0(i2c_periph) = ctl;
-
- addr = addr & I2C_ADDRESS_MASK;
- I2C_SADDR0(i2c_periph) = (addformat | addr);
- }
- void i2c_smbus_type_config(uint32_t i2c_periph, uint32_t type)
- {
- if(I2C_SMBUS_HOST == type){
- I2C_CTL0(i2c_periph) |= I2C_CTL0_SMBSEL;
- }else{
- I2C_CTL0(i2c_periph) &= ~(I2C_CTL0_SMBSEL);
- }
- }
- void i2c_ack_config(uint32_t i2c_periph, uint32_t ack)
- {
- uint32_t ctl = 0U;
- ctl = I2C_CTL0(i2c_periph);
- ctl &= ~(I2C_CTL0_ACKEN);
- ctl |= ack;
- I2C_CTL0(i2c_periph) = ctl;
- }
- void i2c_ackpos_config(uint32_t i2c_periph, uint32_t pos)
- {
- uint32_t ctl = 0U;
-
- ctl = I2C_CTL0(i2c_periph);
- ctl &= ~(I2C_CTL0_POAP);
- ctl |= pos;
- I2C_CTL0(i2c_periph) = ctl;
- }
- void i2c_master_addressing(uint32_t i2c_periph, uint32_t addr, uint32_t trandirection)
- {
-
- if(I2C_TRANSMITTER == trandirection){
- addr = addr & I2C_TRANSMITTER;
- }else{
- addr = addr | I2C_RECEIVER;
- }
-
- I2C_DATA(i2c_periph) = addr;
- }
- void i2c_dualaddr_enable(uint32_t i2c_periph, uint32_t dualaddr)
- {
-
- dualaddr = dualaddr & I2C_ADDRESS2_MASK;
- I2C_SADDR1(i2c_periph) = (I2C_SADDR1_DUADEN | dualaddr);
- }
- void i2c_dualaddr_disable(uint32_t i2c_periph)
- {
- I2C_SADDR1(i2c_periph) &= ~(I2C_SADDR1_DUADEN);
- }
- void i2c_enable(uint32_t i2c_periph)
- {
- I2C_CTL0(i2c_periph) |= I2C_CTL0_I2CEN;
- }
- void i2c_disable(uint32_t i2c_periph)
- {
- I2C_CTL0(i2c_periph) &= ~(I2C_CTL0_I2CEN);
- }
- void i2c_start_on_bus(uint32_t i2c_periph)
- {
- I2C_CTL0(i2c_periph) |= I2C_CTL0_START;
- }
- void i2c_stop_on_bus(uint32_t i2c_periph)
- {
- I2C_CTL0(i2c_periph) |= I2C_CTL0_STOP;
- }
- void i2c_data_transmit(uint32_t i2c_periph, uint8_t data)
- {
- I2C_DATA(i2c_periph) = DATA_TRANS(data);
- }
- uint8_t i2c_data_receive(uint32_t i2c_periph)
- {
- return (uint8_t)DATA_RECV(I2C_DATA(i2c_periph));
- }
- void i2c_dma_config(uint32_t i2c_periph, uint32_t dmastate)
- {
-
- uint32_t ctl = 0U;
- ctl = I2C_CTL1(i2c_periph);
- ctl &= ~(I2C_CTL1_DMAON);
- ctl |= dmastate;
- I2C_CTL1(i2c_periph) = ctl;
- }
- void i2c_dma_last_transfer_config(uint32_t i2c_periph, uint32_t dmalast)
- {
-
- uint32_t ctl = 0U;
-
- ctl = I2C_CTL1(i2c_periph);
- ctl &= ~(I2C_CTL1_DMALST);
- ctl |= dmalast;
- I2C_CTL1(i2c_periph) = ctl;
- }
- void i2c_stretch_scl_low_config(uint32_t i2c_periph, uint32_t stretchpara)
- {
-
- uint32_t ctl = 0U;
-
- ctl = I2C_CTL0(i2c_periph);
- ctl &= ~(I2C_CTL0_SS);
- ctl |= stretchpara;
- I2C_CTL0(i2c_periph) = ctl;
- }
- void i2c_slave_response_to_gcall_config(uint32_t i2c_periph, uint32_t gcallpara)
- {
-
- uint32_t ctl = 0U;
-
- ctl = I2C_CTL0(i2c_periph);
- ctl &= ~(I2C_CTL0_GCEN);
- ctl |= gcallpara;
- I2C_CTL0(i2c_periph) = ctl;
- }
- void i2c_software_reset_config(uint32_t i2c_periph, uint32_t sreset)
- {
-
- uint32_t ctl = 0U;
-
- ctl = I2C_CTL0(i2c_periph);
- ctl &= ~(I2C_CTL0_SRESET);
- ctl |= sreset;
- I2C_CTL0(i2c_periph) = ctl;
- }
- void i2c_pec_config(uint32_t i2c_periph, uint32_t pecstate)
- {
-
- uint32_t ctl = 0U;
-
- ctl = I2C_CTL0(i2c_periph);
- ctl &= ~(I2C_CTL0_PECEN);
- ctl |= pecstate;
- I2C_CTL0(i2c_periph) = ctl;
- }
- void i2c_pec_transfer_config(uint32_t i2c_periph, uint32_t pecpara)
- {
-
- uint32_t ctl = 0U;
-
- ctl = I2C_CTL0(i2c_periph);
- ctl &= ~(I2C_CTL0_PECTRANS);
- ctl |= pecpara;
- I2C_CTL0(i2c_periph) = ctl;
- }
- uint8_t i2c_pec_value_get(uint32_t i2c_periph)
- {
- return (uint8_t)((I2C_STAT1(i2c_periph) & I2C_STAT1_PECV)>>STAT1_PECV_OFFSET);
- }
- void i2c_smbus_alert_config(uint32_t i2c_periph, uint32_t smbuspara)
- {
-
- uint32_t ctl = 0U;
-
- ctl = I2C_CTL0(i2c_periph);
- ctl &= ~(I2C_CTL0_SALT);
- ctl |= smbuspara;
- I2C_CTL0(i2c_periph) = ctl;
- }
- void i2c_smbus_arp_config(uint32_t i2c_periph, uint32_t arpstate)
- {
-
- uint32_t ctl = 0U;
-
- ctl = I2C_CTL0(i2c_periph);
- ctl &= ~(I2C_CTL0_ARPEN);
- ctl |= arpstate;
- I2C_CTL0(i2c_periph) = ctl;
- }
- FlagStatus i2c_flag_get(uint32_t i2c_periph, i2c_flag_enum flag)
- {
- if(RESET != (I2C_REG_VAL(i2c_periph, flag) & BIT(I2C_BIT_POS(flag)))){
- return SET;
- }else{
- return RESET;
- }
- }
- void i2c_flag_clear(uint32_t i2c_periph, i2c_flag_enum flag)
- {
- if(I2C_FLAG_ADDSEND == flag){
-
- I2C_STAT0(i2c_periph);
- I2C_STAT1(i2c_periph);
- }else{
- I2C_REG_VAL(i2c_periph, flag) &= ~BIT(I2C_BIT_POS(flag));
- }
- }
- void i2c_interrupt_enable(uint32_t i2c_periph, i2c_interrupt_enum interrupt)
- {
- I2C_REG_VAL(i2c_periph, interrupt) |= BIT(I2C_BIT_POS(interrupt));
- }
- void i2c_interrupt_disable(uint32_t i2c_periph, i2c_interrupt_enum interrupt)
- {
- I2C_REG_VAL(i2c_periph, interrupt) &= ~BIT(I2C_BIT_POS(interrupt));
- }
- FlagStatus i2c_interrupt_flag_get(uint32_t i2c_periph, i2c_interrupt_flag_enum int_flag)
- {
- uint32_t intenable = 0U, flagstatus = 0U, bufie;
-
-
- bufie = I2C_CTL1(i2c_periph)&I2C_CTL1_BUFIE;
-
-
- intenable = (I2C_REG_VAL(i2c_periph, int_flag) & BIT(I2C_BIT_POS(int_flag)));
-
- flagstatus = (I2C_REG_VAL2(i2c_periph, int_flag) & BIT(I2C_BIT_POS2(int_flag)));
- if((I2C_INT_FLAG_RBNE == int_flag) || (I2C_INT_FLAG_TBE == int_flag)){
- if(intenable && bufie){
- intenable = 1U;
- }else{
- intenable = 0U;
- }
- }
- if((0U != flagstatus) && (0U != intenable)){
- return SET;
- }else{
- return RESET;
- }
- }
- void i2c_interrupt_flag_clear(uint32_t i2c_periph, i2c_interrupt_flag_enum int_flag)
- {
- if(I2C_INT_FLAG_ADDSEND == int_flag){
-
- I2C_STAT0(i2c_periph);
- I2C_STAT1(i2c_periph);
- }else{
- I2C_REG_VAL2(i2c_periph, int_flag) = ~BIT(I2C_BIT_POS2(int_flag));
- }
- }
|