NANO103 BSP V3.01.004
The Board Support Package for Nano103 Series
i2c.c
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1/****************************************************************************/
13#include "Nano103.h"
14
34uint32_t I2C_Open(I2C_T *i2c, uint32_t u32BusClock)
35{
36 uint32_t u32Clk;
37
38 u32Clk = I2C_SetBusClockFreq(i2c, u32BusClock);
39
40 /* Ensable I2C */
41 i2c->CTL |= I2C_CTL_I2CEN_Msk;
42
43 return ( u32Clk );
44}
45
51void I2C_Close(I2C_T *i2c)
52{
53 /* Reset I2C */
54 if((uint32_t)i2c == I2C0_BASE)
55 {
56 SYS->IPRST2 |= SYS_IPRST2_I2C0RST_Msk;
57 SYS->IPRST2 &= ~SYS_IPRST2_I2C0RST_Msk;
58 }
59 else
60 {
61 SYS->IPRST2 |= SYS_IPRST2_I2C1RST_Msk;
62 SYS->IPRST2 &= ~SYS_IPRST2_I2C1RST_Msk;
63 }
64
65 /* Disable I2C */
66 i2c->CTL &= ~I2C_CTL_I2CEN_Msk;
67}
68
75{
77}
78
88void I2C_Trigger(I2C_T *i2c, uint8_t u8Start, uint8_t u8Stop, uint8_t u8Si, uint8_t u8Ack)
89{
90 uint32_t u32Reg = 0;
91 uint32_t u32Val = i2c->CTL & ~(I2C_STA | I2C_STO | I2C_AA);
92
93 if (u8Start)
94 u32Reg |= I2C_STA;
95 if (u8Stop)
96 u32Reg |= I2C_STO;
97 if (u8Si)
98 u32Reg |= I2C_SI;
99 if (u8Ack)
100 u32Reg |= I2C_AA;
101
102 i2c->CTL = u32Val | u32Reg;
103}
104
111{
112 i2c->CTL &= ~I2C_CTL_INTEN_Msk;
113}
114
121{
122 i2c->CTL |= I2C_CTL_INTEN_Msk;
123}
124
131{
132 uint32_t u32Divider = i2c->CLKDIV;
133
134 if(i2c == I2C0)
135 return ( CLK_GetPCLK0Freq() / ((u32Divider+1)<<2) );
136 else
137 return ( CLK_GetPCLK1Freq() / ((u32Divider+1)<<2) );
138}
139
146uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock)
147{
148 uint32_t u32Div;
149 uint32_t volatile u32Pclk;
150
151 if((uint32_t)i2c == I2C0_BASE)
152 {
153 u32Pclk = CLK_GetPCLK0Freq();
154 }
155 else
156 {
157 u32Pclk = CLK_GetPCLK1Freq();
158 }
159
160 u32Div = (uint32_t) (((u32Pclk * 10)/(u32BusClock * 4) + 5) / 10 - 1); /* Compute proper divider for I2C clock */
161 i2c->CLKDIV = u32Div;
162
163 return ( u32Pclk / ((u32Div+1)<<2) );
164}
165
173uint32_t I2C_GetIntFlag(I2C_T *i2c)
174{
175 return ( (i2c->INTSTS & I2C_INTSTS_INTSTS_Msk) == I2C_INTSTS_INTSTS_Msk ? 1:0 );
176}
177
184{
186}
187
193uint32_t I2C_GetStatus(I2C_T *i2c)
194{
195 return ( i2c->STATUS );
196}
197
203uint32_t I2C_GetData(I2C_T *i2c)
204{
205 return ( i2c->DAT );
206}
207
214void I2C_SetData(I2C_T *i2c, uint8_t u8Data)
215{
216 i2c->DAT = u8Data;
217}
218
229void I2C_SetSlaveAddr(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddr, uint8_t u8GCMode)
230{
231 switch (u8SlaveNo)
232 {
233 case 0:
234 i2c->ADDR0 = (u8SlaveAddr << 1) | u8GCMode;
235 break;
236 case 1:
237 i2c->ADDR1 = (u8SlaveAddr << 1) | u8GCMode;
238 break;
239 default:
240 i2c->ADDR0 = (u8SlaveAddr << 1) | u8GCMode;
241 }
242}
243
251void I2C_SetSlaveAddrMask(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddrMask)
252{
253 switch (u8SlaveNo)
254 {
255 case 0:
256 i2c->ADDRMSK0 = u8SlaveAddrMask << 1;
257 break;
258 case 1:
259 i2c->ADDRMSK1 = u8SlaveAddrMask << 1;
260 break;
261 default:
262 i2c->ADDRMSK0 = u8SlaveAddrMask << 1;
263 }
264}
265
272void I2C_EnableTimeout(I2C_T *i2c, uint8_t u8LongTimeout)
273{
274 if(u8LongTimeout)
276 else
277 i2c->TOCTL &= ~I2C_TOCTL_TOCDIV4_Msk;
278
280}
281
288{
289 i2c->TOCTL &= ~I2C_TOCTL_TOCEN_Msk;
290}
291
298{
300}
301
308{
309 i2c->CTL2 &= ~I2C_CTL2_WKUPEN_Msk;
310}
311 /* end of group NANO103_I2C_EXPORTED_FUNCTIONS */
313 /* end of group NANO103_I2C_Driver */
315 /* end of group NANO103_Device_Driver */
317
318/*** (C) COPYRIGHT 2015 Nuvoton Technology Corp. ***/
NANO103 peripheral access layer header file. This file contains all the peripheral register's definit...
#define I2C_INTSTS_TOIF_Msk
Definition: Nano103.h:12362
#define I2C_CTL_INTEN_Msk
Definition: Nano103.h:12356
#define I2C_INTSTS_INTSTS_Msk
Definition: Nano103.h:12359
#define I2C_TOCTL_TOCEN_Msk
Definition: Nano103.h:12374
#define I2C_CTL2_WKUPEN_Msk
Definition: Nano103.h:12401
#define I2C_CTL_I2CEN_Msk
Definition: Nano103.h:12341
#define I2C_TOCTL_TOCDIV4_Msk
Definition: Nano103.h:12377
uint32_t CLK_GetPCLK1Freq(void)
This function get PCLK1 frequency. The frequency unit is Hz.
Definition: clk.c:152
uint32_t CLK_GetPCLK0Freq(void)
This function get PCLK0 frequency. The frequency unit is Hz.
Definition: clk.c:138
#define SYS_IPRST2_I2C1RST_Msk
Definition: Nano103.h:1681
#define SYS_IPRST2_I2C0RST_Msk
Definition: Nano103.h:1678
#define I2C_SI
Definition: i2c.h:35
#define I2C_AA
Definition: i2c.h:36
#define I2C_STO
Definition: i2c.h:34
#define I2C_STA
Definition: i2c.h:33
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:251
void I2C_Close(I2C_T *i2c)
This function closes the I2C module.
Definition: i2c.c:51
uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock)
This function sets bus frequency of I2C module.
Definition: i2c.c:146
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:88
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:272
void I2C_ClearTimeoutFlag(I2C_T *i2c)
This function clears the timeout flag.
Definition: i2c.c:74
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:229
void I2C_SetData(I2C_T *i2c, uint8_t u8Data)
This function writes the data to data register of I2C module.
Definition: i2c.c:214
uint32_t I2C_GetBusClockFreq(I2C_T *i2c)
This function returns the real bus clock of I2C module.
Definition: i2c.c:130
void I2C_EnableInt(I2C_T *i2c)
This function enables the interrupt (EI bit) of I2C module.
Definition: i2c.c:120
void I2C_DisableWakeup(I2C_T *i2c)
This function disables the wakeup function of I2C module.
Definition: i2c.c:307
uint32_t I2C_GetStatus(I2C_T *i2c)
This function returns the status of I2C module.
Definition: i2c.c:193
void I2C_DisableInt(I2C_T *i2c)
This function disables the interrupt of I2C module.
Definition: i2c.c:110
uint32_t I2C_GetData(I2C_T *i2c)
This function returns the data stored in data register of I2C module.
Definition: i2c.c:203
void I2C_EnableWakeup(I2C_T *i2c)
This function enables the wakeup function of I2C module.
Definition: i2c.c:297
void I2C_ClearIntFlag(I2C_T *i2c)
This function clears the interrupt flag of I2C module.
Definition: i2c.c:183
uint32_t I2C_GetIntFlag(I2C_T *i2c)
This function gets the interrupt flag of I2C module.
Definition: i2c.c:173
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
void I2C_DisableTimeout(I2C_T *i2c)
This function disables timeout function.
Definition: i2c.c:287
#define I2C0
Pointer to I2C0 register structure.
Definition: Nano103.h:13786
#define SYS
Pointer to SYS register structure.
Definition: Nano103.h:13801
#define I2C0_BASE
I2C0 register base address.
Definition: Nano103.h:13733
__IO uint32_t ADDRMSK1
Definition: Nano103.h:12326
__IO uint32_t ADDR0
Definition: Nano103.h:12320
__IO uint32_t TOCTL
Definition: Nano103.h:12318
__IO uint32_t CLKDIV
Definition: Nano103.h:12317
__IO uint32_t CTL
Definition: Nano103.h:12314
__IO uint32_t DAT
Definition: Nano103.h:12319
__IO uint32_t ADDR1
Definition: Nano103.h:12321
__IO uint32_t ADDRMSK0
Definition: Nano103.h:12325
__IO uint32_t CTL2
Definition: Nano103.h:12330
__I uint32_t STATUS
Definition: Nano103.h:12316
__IO uint32_t INTSTS
Definition: Nano103.h:12315