Nano102_112 Series BSP  V3.03.002
The Board Support Package for Nano102_112 Series
i2c.c
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1 /****************************************************************************/
13 #include "Nano1X2Series.h"
14 
34 uint32_t I2C_Open(I2C_T *i2c, uint32_t u32BusClock)
35 {
36  uint32_t u32Div;
37  uint32_t u32Pclk = CLK_GetPCLKFreq();
38 
39  u32Div = (uint32_t) (((u32Pclk * 10)/(u32BusClock * 4) + 5) / 10 - 1); /* Compute proper divider for I2C clock */
40  i2c->DIV = u32Div;
41 
42  /* Ensable I2C */
43  i2c->CON |= I2C_CON_IPEN_Msk;
44 
45  return ( u32Pclk / ((u32Div+1)<<2) );
46 }
47 
53 void I2C_Close(I2C_T *i2c)
54 {
55  /* Reset I2C */
56  if((uint32_t)i2c == I2C0_BASE)
57  {
58  SYS->IPRST_CTL2 |= SYS_IPRST_CTL2_I2C0_RST_Msk;
59  SYS->IPRST_CTL2 &= ~SYS_IPRST_CTL2_I2C0_RST_Msk;
60  }
61  else
62  {
63  SYS->IPRST_CTL2 |= SYS_IPRST_CTL2_I2C1_RST_Msk;
64  SYS->IPRST_CTL2 &= ~SYS_IPRST_CTL2_I2C1_RST_Msk;
65  }
66 
67  /* Disable I2C */
68  i2c->CON &= ~I2C_CON_IPEN_Msk;
69 }
70 
77 {
78  i2c->INTSTS |= I2C_INTSTS_TIF_Msk;
79 }
80 
90 void I2C_Trigger(I2C_T *i2c, uint8_t u8Start, uint8_t u8Stop, uint8_t u8Si, uint8_t u8Ack)
91 {
92  uint32_t u32Reg = 0;
93  uint32_t u32Val = i2c->CON & ~(I2C_STA | I2C_STO | I2C_AA);
94 
95  if (u8Start)
96  u32Reg |= I2C_STA;
97  if (u8Stop)
98  u32Reg |= I2C_STO;
99  if (u8Si)
100  u32Reg |= I2C_SI;
101  if (u8Ack)
102  u32Reg |= I2C_AA;
103 
104  i2c->CON = u32Val | u32Reg;
105 }
106 
113 {
114  i2c->CON &= ~I2C_CON_INTEN_Msk;
115 }
116 
123 {
124  i2c->CON |= I2C_CON_INTEN_Msk;
125 }
126 
133 {
134  uint32_t u32Divider = i2c->DIV;
135 
136  return ( CLK_GetPCLKFreq() / ((u32Divider+1)<<2) );
137 }
138 
145 uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock)
146 {
147  uint32_t u32Div;
148  uint32_t u32Pclk = CLK_GetPCLKFreq();
149 
150  u32Div = (uint32_t) (((u32Pclk * 10)/(u32BusClock * 4) + 5) / 10 - 1); /* Compute proper divider for I2C clock */
151  i2c->DIV = u32Div;
152 
153  return ( u32Pclk / ((u32Div+1)<<2) );
154 }
155 
163 uint32_t I2C_GetIntFlag(I2C_T *i2c)
164 {
165  return ( (i2c->INTSTS & I2C_INTSTS_INTSTS_Msk) == I2C_INTSTS_INTSTS_Msk ? 1:0 );
166 }
167 
174 {
176 }
177 
183 uint32_t I2C_GetStatus(I2C_T *i2c)
184 {
185  return ( i2c->STATUS );
186 }
187 
193 uint32_t I2C_GetData(I2C_T *i2c)
194 {
195  return ( i2c->DATA );
196 }
197 
204 void I2C_SetData(I2C_T *i2c, uint8_t u8Data)
205 {
206  i2c->DATA = u8Data;
207 }
208 
219 void I2C_SetSlaveAddr(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddr, uint8_t u8GCMode)
220 {
221  switch (u8SlaveNo)
222  {
223  case 0:
224  i2c->SADDR0 = (u8SlaveAddr << 1) | u8GCMode;
225  break;
226  case 1:
227  i2c->SADDR1 = (u8SlaveAddr << 1) | u8GCMode;
228  break;
229  default:
230  i2c->SADDR0 = (u8SlaveAddr << 1) | u8GCMode;
231  }
232 }
233 
241 void I2C_SetSlaveAddrMask(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddrMask)
242 {
243  switch (u8SlaveNo)
244  {
245  case 0:
246  i2c->SAMASK0 = u8SlaveAddrMask << 1;
247  break;
248  case 1:
249  i2c->SAMASK1 = u8SlaveAddrMask << 1;
250  break;
251  default:
252  i2c->SAMASK0 = u8SlaveAddrMask << 1;
253  }
254 }
255 
262 void I2C_EnableTimeout(I2C_T *i2c, uint8_t u8LongTimeout)
263 {
264  if(u8LongTimeout)
265  i2c->TOUT |= I2C_TOUT_DIV4_Msk;
266  else
267  i2c->TOUT &= ~I2C_TOUT_DIV4_Msk;
268 
269  i2c->TOUT |= I2C_TOUT_TOUTEN_Msk;
270 }
271 
278 {
279  i2c->TOUT &= ~I2C_TOUT_TOUTEN_Msk;
280 }
281 
288 {
289  i2c->CON2 |= I2C_CON2_WKUPEN_Msk;
290 }
291 
298 {
299  i2c->CON2 &= ~I2C_CON2_WKUPEN_Msk;
300 }
301  /* end of group NANO1X2_I2C_EXPORTED_FUNCTIONS */
303  /* end of group NANO1X2_I2C_Driver */
305  /* end of group NANO1X2_Device_Driver */
307 
308 /*** (C) COPYRIGHT 2014 Nuvoton Technology Corp. ***/
void I2C_EnableWakeup(I2C_T *i2c)
This function enables the wakeup function of I2C module.
Definition: i2c.c:287
#define I2C_SI
Definition: i2c.h:35
void I2C_SetData(I2C_T *i2c, uint8_t u8Data)
This function writes the data to data register of I2C module.
Definition: i2c.c:204
#define I2C_INTSTS_TIF_Msk
#define SYS_IPRST_CTL2_I2C0_RST_Msk
void I2C_ClearIntFlag(I2C_T *i2c)
This function clears the interrupt flag of I2C module.
Definition: i2c.c:173
#define I2C_STA
Definition: i2c.h:33
#define I2C_AA
Definition: i2c.h:36
uint32_t I2C_GetIntFlag(I2C_T *i2c)
This function gets the interrupt flag of I2C module.
Definition: i2c.c:163
__IO uint32_t CON2
__I uint32_t STATUS
void I2C_DisableInt(I2C_T *i2c)
This function disables the interrupt of I2C module.
Definition: i2c.c:112
void I2C_DisableWakeup(I2C_T *i2c)
This function disables the wakeup function of I2C module.
Definition: i2c.c:297
uint32_t I2C_GetData(I2C_T *i2c)
This function returns the data stored in data register of I2C module.
Definition: i2c.c:193
void I2C_SetSlaveAddrMask(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddrMask)
Configure the mask of slave address. The corresponding address bit is "Don't Care".
Definition: i2c.c:241
void I2C_Close(I2C_T *i2c)
This function closes the I2C module.
Definition: i2c.c:53
__IO uint32_t INTSTS
#define I2C_CON_INTEN_Msk
Nano102/112 peripheral access layer header file. This file contains all the peripheral register's def...
#define I2C0_BASE
I2C0 register base address.
__IO uint32_t SAMASK1
#define I2C_CON2_WKUPEN_Msk
__IO uint32_t SADDR0
void I2C_EnableInt(I2C_T *i2c)
This function enables the interrupt (EI bit) of I2C module.
Definition: i2c.c:122
#define I2C_CON_IPEN_Msk
#define I2C_STO
Definition: i2c.h:34
uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock)
This function sets bus frequency of I2C module.
Definition: i2c.c:145
void I2C_DisableTimeout(I2C_T *i2c)
This function disables timeout function.
Definition: i2c.c:277
#define I2C_TOUT_TOUTEN_Msk
uint32_t I2C_GetBusClockFreq(I2C_T *i2c)
This function returns the real bus clock of I2C module.
Definition: i2c.c:132
void I2C_ClearTimeoutFlag(I2C_T *i2c)
This function clears the timeout flag.
Definition: i2c.c:76
__IO uint32_t DIV
void I2C_Trigger(I2C_T *i2c, uint8_t u8Start, uint8_t u8Stop, uint8_t u8Si, uint8_t u8Ack)
This function sets the control bit of the I2C module.
Definition: i2c.c:90
uint32_t I2C_Open(I2C_T *i2c, uint32_t u32BusClock)
This function make I2C module be ready and set the wanted bus clock.
Definition: i2c.c:34
__IO uint32_t DATA
__IO uint32_t TOUT
uint32_t I2C_GetStatus(I2C_T *i2c)
This function returns the status of I2C module.
Definition: i2c.c:183
#define SYS_IPRST_CTL2_I2C1_RST_Msk
void I2C_EnableTimeout(I2C_T *i2c, uint8_t u8LongTimeout)
This function enables timeout function and configures DIV4 function to support long timeout.
Definition: i2c.c:262
__IO uint32_t SAMASK0
void I2C_SetSlaveAddr(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddr, uint8_t u8GCMode)
Configure slave address and enable GC mode.
Definition: i2c.c:219
__IO uint32_t SADDR1
#define I2C_INTSTS_INTSTS_Msk
#define SYS
Pointer to SYS register structure.
#define I2C_TOUT_DIV4_Msk
uint32_t CLK_GetPCLKFreq(void)
This function get PCLK frequency. The frequency unit is Hz.
Definition: clk.c:203
__IO uint32_t CON