NANO100_BSP V3.04.002
The Board Support Package for Nano100BN Series
i2c.c
Go to the documentation of this file.
1/****************************************************************************/
13#include "Nano100Series.h"
14
34uint32_t I2C_Open(I2C_T *i2c, uint32_t u32BusClock)
35{
36 uint32_t u32Div;
37
38 u32Div = (uint32_t) (((SystemCoreClock * 10)/(u32BusClock * 4) + 5) / 10 - 1); /* Compute proper divider for I2C clock */
39 i2c->DIV = u32Div;
40
41 /* Enable I2C */
42 i2c->CON |= I2C_CON_IPEN_Msk;
43
44 return ( SystemCoreClock / ((u32Div+1)<<2) );
45}
46
52void I2C_Close(I2C_T *i2c)
53{
54 /* Reset I2C */
55 if((uint32_t)i2c == I2C0_BASE)
56 {
57 SYS->IPRST_CTL2 |= SYS_IPRST_CTL2_I2C0_RST_Msk;
58 SYS->IPRST_CTL2 &= ~SYS_IPRST_CTL2_I2C0_RST_Msk;
59 }
60 else
61 {
62 SYS->IPRST_CTL2 |= SYS_IPRST_CTL2_I2C1_RST_Msk;
63 SYS->IPRST_CTL2 &= ~SYS_IPRST_CTL2_I2C1_RST_Msk;
64 }
65
66 /* Disable I2C */
67 i2c->CON &= ~I2C_CON_IPEN_Msk;
68}
69
76{
78}
79
89void I2C_Trigger(I2C_T *i2c, uint8_t u8Start, uint8_t u8Stop, uint8_t u8Si, uint8_t u8Ack)
90{
91 uint32_t u32Reg = 0;
92 uint32_t u32Val = i2c->CON & ~(I2C_STA | I2C_STO | I2C_AA);
93
94 if (u8Start)
95 u32Reg |= I2C_STA;
96 if (u8Stop)
97 u32Reg |= I2C_STO;
98 if (u8Si)
99 u32Reg |= I2C_SI;
100 if (u8Ack)
101 u32Reg |= I2C_AA;
102
103 i2c->CON = u32Val | u32Reg;
104}
105
112{
113 i2c->CON &= ~I2C_CON_INTEN_Msk;
114}
115
122{
123 i2c->CON |= I2C_CON_INTEN_Msk;
124}
125
132{
133 uint32_t u32Divider = i2c->DIV;
134
135 return ( SystemCoreClock / ((u32Divider+1)<<2) );
136}
137
144uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock)
145{
146 uint32_t u32Div;
147
148 u32Div = (uint32_t) (((SystemCoreClock * 10)/(u32BusClock * 4) + 5) / 10 - 1); /* Compute proper divider for I2C clock */
149 i2c->DIV = u32Div;
150
151 return ( SystemCoreClock / ((u32Div+1)<<2) );
152}
153
161uint32_t I2C_GetIntFlag(I2C_T *i2c)
162{
163 return ( (i2c->INTSTS & I2C_INTSTS_INTSTS_Msk) == I2C_INTSTS_INTSTS_Msk ? 1:0 );
164}
165
172{
174}
175
181uint32_t I2C_GetStatus(I2C_T *i2c)
182{
183 return ( i2c->STATUS );
184}
185
191uint32_t I2C_GetData(I2C_T *i2c)
192{
193 return ( i2c->DATA );
194}
195
202void I2C_SetData(I2C_T *i2c, uint8_t u8Data)
203{
204 i2c->DATA = u8Data;
205}
206
217void I2C_SetSlaveAddr(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddr, uint8_t u8GCMode)
218{
219 switch (u8SlaveNo)
220 {
221 case 0:
222 i2c->SADDR0 = (u8SlaveAddr << 1) | u8GCMode;
223 break;
224 case 1:
225 i2c->SADDR1 = (u8SlaveAddr << 1) | u8GCMode;
226 break;
227 }
228}
229
237void I2C_SetSlaveAddrMask(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddrMask)
238{
239 switch (u8SlaveNo)
240 {
241 case 0:
242 i2c->SAMASK0 = u8SlaveAddrMask << 1;
243 break;
244 case 1:
245 i2c->SAMASK1 = u8SlaveAddrMask << 1;
246 break;
247 }
248}
249
256void I2C_EnableTimeout(I2C_T *i2c, uint8_t u8LongTimeout)
257{
258 if(u8LongTimeout)
259 i2c->TOUT |= I2C_TOUT_DIV4_Msk;
260 else
261 i2c->TOUT &= ~I2C_TOUT_DIV4_Msk;
262
264}
265
272{
273 i2c->TOUT &= ~I2C_TOUT_TOUTEN_Msk;
274}
275
282{
284}
285
292{
293 i2c->WKUPCON &= ~I2C_WKUPCON_WKUPEN_Msk;
294}
295 /* end of group NANO100_I2C_EXPORTED_FUNCTIONS */
297 /* end of group NANO100_I2C_Driver */
299 /* end of group NANO100_Device_Driver */
301
302/*** (C) COPYRIGHT 2014 Nuvoton Technology Corp. ***/
Nano100 series peripheral access layer header file. This file contains all the peripheral register's ...
#define I2C_CON_INTEN_Msk
#define I2C_INTSTS_INTSTS_Msk
#define I2C_TOUT_TOUTEN_Msk
#define I2C_CON_IPEN_Msk
#define I2C_WKUPCON_WKUPEN_Msk
#define SYS_IPRST_CTL2_I2C1_RST_Msk
#define I2C_INTSTS_TIF_Msk
#define I2C_TOUT_DIV4_Msk
#define SYS_IPRST_CTL2_I2C0_RST_Msk
#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:237
void I2C_Close(I2C_T *i2c)
This function closes the I2C module.
Definition: i2c.c:52
uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock)
This function sets bus frequency of I2C module.
Definition: i2c.c:144
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:89
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:256
void I2C_ClearTimeoutFlag(I2C_T *i2c)
This function clears the timeout flag.
Definition: i2c.c:75
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:217
void I2C_SetData(I2C_T *i2c, uint8_t u8Data)
This function writes the data to data register of I2C module.
Definition: i2c.c:202
uint32_t I2C_GetBusClockFreq(I2C_T *i2c)
This function returns the real bus clock of I2C module.
Definition: i2c.c:131
void I2C_EnableInt(I2C_T *i2c)
This function enables the interrupt (EI bit) of I2C module.
Definition: i2c.c:121
void I2C_DisableWakeup(I2C_T *i2c)
This function disables the wakeup function of I2C module.
Definition: i2c.c:291
uint32_t I2C_GetStatus(I2C_T *i2c)
This function returns the status of I2C module.
Definition: i2c.c:181
void I2C_DisableInt(I2C_T *i2c)
This function disables the interrupt of I2C module.
Definition: i2c.c:111
uint32_t I2C_GetData(I2C_T *i2c)
This function returns the data stored in data register of I2C module.
Definition: i2c.c:191
void I2C_EnableWakeup(I2C_T *i2c)
This function enables the wakeup function of I2C module.
Definition: i2c.c:281
void I2C_ClearIntFlag(I2C_T *i2c)
This function clears the interrupt flag of I2C module.
Definition: i2c.c:171
uint32_t I2C_GetIntFlag(I2C_T *i2c)
This function gets the interrupt flag of I2C module.
Definition: i2c.c:161
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:271
#define SYS
Pointer to SYS register structure.
#define I2C0_BASE
I2C0 register base address.
__IO uint32_t SAMASK1
__IO uint32_t INTSTS
__IO uint32_t CON
__IO uint32_t TOUT
__I uint32_t STATUS
__IO uint32_t SADDR1
__IO uint32_t SADDR0
__IO uint32_t DIV
__IO uint32_t DATA
__IO uint32_t WKUPCON
__IO uint32_t SAMASK0
uint32_t SystemCoreClock