| NANO100_BSP V3.05.000 The Board Support Package for Nano100BN Series

scuart.c
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1/**************************************************************************/
12#include "Nano100Series.h"
13
32 void SCUART_Close(SC_T* sc)
33{
34 sc->IER = 0;
35 sc->UACTL = 0;
36 sc->CTL = 0;
37
38}
39
41
46 static uint32_t SCUART_GetClock(SC_T *sc)
47{
48 uint32_t u32ClkSrc = (CLK->CLKSEL2 & CLK_CLKSEL2_SC_S_Msk) >> CLK_CLKSEL2_SC_S_Pos;
49 uint32_t u32Clk;
50
51 // Get smartcard module clock
52 if(u32ClkSrc == 0)
53 u32Clk = __HXT;
54 else if(u32ClkSrc == 1)
55 u32Clk = CLK_GetPLLClockFreq();
56 else
57 u32Clk = __HIRC12M;
58
59 if(sc == SC0)
60 u32Clk /= ((CLK->CLKDIV0 & CLK_CLKDIV0_SC0_N_Msk) >> CLK_CLKDIV0_SC0_N_Pos) + 1;
61 else if(sc == SC1)
62 u32Clk /= (CLK->CLKDIV1 & CLK_CLKDIV1_SC1_N_Msk) + 1;
63 else // SC2
64 u32Clk /= ((CLK->CLKDIV1 & CLK_CLKDIV1_SC2_N_Msk) >> CLK_CLKDIV1_SC2_N_Pos) + 1;
65
66 return u32Clk;
67}
68
70
85uint32_t SCUART_Open(SC_T* sc, uint32_t u32baudrate)
86{
87 uint32_t u32Clk = SCUART_GetClock(sc), u32Div;
88
89 // Calculate divider for target baudrate
90 u32Div = (u32Clk + (u32baudrate >> 1) - 1) / u32baudrate - 1;
91
92 sc->CTL = SC_CTL_SC_CEN_Msk | SC_CTL_SLEN_Msk; // Enable smartcard interface and stop bit = 1
93 sc->UACTL = SCUART_CHAR_LEN_8 | SCUART_PARITY_NONE | SC_UACTL_UA_MODE_EN_Msk; // Enable UART mode, disable parity and 8 bit per character
94 sc->ETUCR = u32Div;
95
96 return(u32Clk / (u32Div + 1));
97}
98
107uint32_t SCUART_Read(SC_T* sc, uint8_t *pu8RxBuf, uint32_t u32ReadBytes)
108{
109 uint32_t u32Count;
110
111 for(u32Count = 0; u32Count < u32ReadBytes; u32Count++)
112 {
113 if(SCUART_GET_RX_EMPTY(sc)) // no data available
114 {
115 break;
116 }
117 pu8RxBuf[u32Count] = SCUART_READ(sc); // get data from FIFO
118 }
119
120 return u32Count;
121}
122
147uint32_t SCUART_SetLineConfig(SC_T* sc, uint32_t u32Baudrate, uint32_t u32DataWidth, uint32_t u32Parity, uint32_t u32StopBits)
148{
149
150 uint32_t u32Clk = SCUART_GetClock(sc), u32Div;
151
152 if(u32Baudrate == 0) // keep original baudrate setting
153 {
154 u32Div = sc->ETUCR & SC_ETUCR_ETU_RDIV_Msk;
155 }
156 else
157 {
158 // Calculate divider for target baudrate
159 u32Div = (u32Clk + (u32Baudrate >> 1) - 1)/ u32Baudrate - 1;
160 sc->ETUCR = u32Div;
161 }
162
163 sc->CTL = u32StopBits | SC_CTL_SC_CEN_Msk; // Set stop bit
164 sc->UACTL = u32Parity | u32DataWidth | SC_UACTL_UA_MODE_EN_Msk; // Set character width and parity
165
166 return(u32Clk / (u32Div + 1));
167}
168
179 void SCUART_SetTimeoutCnt(SC_T* sc, uint32_t u32TOC)
180{
181 sc->RFTMR = u32TOC;
182}
183
184
193 void SCUART_Write(SC_T* sc,uint8_t *pu8TxBuf, uint32_t u32WriteBytes)
194{
195 uint32_t u32Count;
196 int32_t i32TimeoutCnt = SystemCoreClock/10;
197
198 for(u32Count = 0; u32Count != u32WriteBytes; u32Count++)
199 {
200 while(SCUART_GET_TX_FULL(sc)) { // Wait 'til FIFO not full
201 if(i32TimeoutCnt-- <= 0)
202 break;
203 }
204 sc->THR = pu8TxBuf[u32Count]; // Write 1 byte to FIFO
205 }
206}
207
208 /* end of group NANO100_SCUART_EXPORTED_FUNCTIONS */
210 /* end of group NANO100_SCUART_Driver */
212 /* end of group NANO100_Device_Driver */
214
215/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
Nano100Series.h
Nano100 series peripheral access layer header file. This file contains all the peripheral register's ...
SC_CTL_SLEN_Msk
#define SC_CTL_SLEN_Msk
Definition: Nano100Series.h:8920
SC_UACTL_UA_MODE_EN_Msk
#define SC_UACTL_UA_MODE_EN_Msk
Definition: Nano100Series.h:9160
SC_CTL_SC_CEN_Msk
#define SC_CTL_SC_CEN_Msk
Definition: Nano100Series.h:8896
SC_ETUCR_ETU_RDIV_Msk
#define SC_ETUCR_ETU_RDIV_Msk
Definition: Nano100Series.h:8983
CLK_GetPLLClockFreq
uint32_t CLK_GetPLLClockFreq(void)
This function get PLL frequency. The frequency unit is Hz.
Definition: clk.c:142
CLK_CLKSEL2_SC_S_Msk
#define CLK_CLKSEL2_SC_S_Msk
Definition: Nano100Series.h:1402
CLK_CLKDIV1_SC2_N_Pos
#define CLK_CLKDIV1_SC2_N_Pos
Definition: Nano100Series.h:1434
CLK_CLKDIV1_SC2_N_Msk
#define CLK_CLKDIV1_SC2_N_Msk
Definition: Nano100Series.h:1435
CLK_CLKDIV0_SC0_N_Pos
#define CLK_CLKDIV0_SC0_N_Pos
Definition: Nano100Series.h:1428
CLK_CLKDIV0_SC0_N_Msk
#define CLK_CLKDIV0_SC0_N_Msk
Definition: Nano100Series.h:1429
CLK_CLKSEL2_SC_S_Pos
#define CLK_CLKSEL2_SC_S_Pos
Definition: Nano100Series.h:1401
CLK_CLKDIV1_SC1_N_Msk
#define CLK_CLKDIV1_SC1_N_Msk
Definition: Nano100Series.h:1432
CLK
#define CLK
Pointer to CLK register structure.
Definition: Nano100Series.h:11693
SC1
#define SC1
Pointer to SC1 register structure.
Definition: Nano100Series.h:11686
SC0
#define SC0
Pointer to SC0 register structure.
Definition: Nano100Series.h:11685
SCUART_CHAR_LEN_8
#define SCUART_CHAR_LEN_8
Definition: scuart.h:35
SCUART_PARITY_NONE
#define SCUART_PARITY_NONE
Definition: scuart.h:37
SCUART_SetTimeoutCnt
void SCUART_SetTimeoutCnt(SC_T *sc, uint32_t u32TOC)
This function use to set receive timeout count.
Definition: scuart.c:179
SCUART_GET_TX_FULL
#define SCUART_GET_TX_FULL(sc)
Get TX FIFO full flag status from register.
Definition: scuart.h:80
SCUART_Read
uint32_t SCUART_Read(SC_T *sc, uint8_t *pu8RxBuf, uint32_t u32ReadBytes)
The function is used to read Rx data from RX FIFO.
Definition: scuart.c:107
SCUART_GET_RX_EMPTY
#define SCUART_GET_RX_EMPTY(sc)
Get RX FIFO empty flag status from register.
Definition: scuart.h:130
SCUART_Write
void SCUART_Write(SC_T *sc, uint8_t *pu8TxBuf, uint32_t u32WriteBytes)
This function is to write data into transmit FIFO to send data out.
Definition: scuart.c:193
SCUART_READ
#define SCUART_READ(sc)
Read Rx data register.
Definition: scuart.h:120
SCUART_SetLineConfig
uint32_t SCUART_SetLineConfig(SC_T *sc, uint32_t u32Baudrate, uint32_t u32DataWidth, uint32_t u32Parity, uint32_t u32StopBits)
This function use to config smartcard UART mode line setting.
Definition: scuart.c:147
SCUART_Open
uint32_t SCUART_Open(SC_T *sc, uint32_t u32baudrate)
This function use to enable smartcard module UART mode and set baudrate.
Definition: scuart.c:85
SCUART_Close
void SCUART_Close(SC_T *sc)
The function is used to disable smartcard interface UART mode.
Definition: scuart.c:32
SC_T::UACTL
__IO uint32_t UACTL
Definition: Nano100Series.h:8857
SC_T::ETUCR
__IO uint32_t ETUCR
Definition: Nano100Series.h:8526
SC_T::CTL
__IO uint32_t CTL
Definition: Nano100Series.h:8388
SC_T::RFTMR
__IO uint32_t RFTMR
Definition: Nano100Series.h:8506
SC_T::THR
__O uint32_t THR
Definition: Nano100Series.h:8300
SC_T::IER
__IO uint32_t IER
Definition: Nano100Series.h:8582
SC_T
Definition: Nano100Series.h:8274
__HXT
#define __HXT
Definition: system_Nano100Series.h:26
SystemCoreClock
uint32_t SystemCoreClock
Definition: system_Nano100Series.c:20
__HIRC12M
#define __HIRC12M
Definition: system_Nano100Series.h:28