[討論] SIM卡對拷機

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洪嵐峰

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發表於 2023-5-6 19:27:00 |只看該作者 |倒序瀏覽

製作SIM卡對拷機需要以下材料：

LPC11U35FHI33/501 微控制器板
SIM卡插座
3.3V電源供應器
USB轉串口模塊
杜邦線
麵包板

以下是LPC11U35FHI33/501的連結腳位：

P0.15 – UART1_TXD
P0.16 – UART1_RXD
P0.11 – SIM卡VCC電源
P0.12 – SIM卡GND電源
P0.13 – SIM卡RST引腳
P0.14 – SIM卡I/O引腳

以下是LPC11U35FHI33/501的程式碼，使用Keil開發環境和C語言編寫：

#include <LPC11Uxx.h>
#include <stdio.h>

#define SIM_VCC    (1 << 11)
#define SIM_GND    (1 << 12)
#define SIM_RST    (1 << 13)
#define SIM_IO    (1 << 14)

void uart_init(void) {
LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 16); // enable UART clock
LPC_SYSCON->UARTCLKDIV = 1;             // set UART clock divider to 1
LPC_IOCON->PIO1_6 |= 0x01;                // set PIO1_6 to TXD mode
LPC_IOCON->PIO1_7 |= 0x01;                // set PIO1_7 to RXD mode
LPC_UART->LCR = (1 << 7);                // set DLAB bit to enable baud rate setting
LPC_UART->DLM = 0;                         // set baud rate to 9600
LPC_UART->DLL = 104;
LPC_UART->FDR = (1 << 4) | 5;
LPC_UART->LCR = 3;                         // set data length to 8 bits, no parity, 1 stop bit
}

void sim_init(void) {
LPC_GPIO->DIR[0] |= SIM_VCC | SIM_GND | SIM_RST | SIM_IO; // set SIM card pins as output
LPC_GPIO->CLR[0] = SIM_VCC | SIM_GND | SIM_RST | SIM_IO; // set SIM card pins low
LPC_GPIO->SET[0] = SIM_VCC;                // enable SIM card power supply
LPC_GPIO->CLR[0] = SIM_RST;                // reset SIM card
for (volatile int i = 0; i < 50000; i++); // wait for a while
LPC_GPIO->SET[0] = SIM_RST;                // release SIM card reset
for (volatile int i = 0; i < 50000; i++); // wait for a while
}

void sim_select(void) {
LPC_GPIO->CLR[0] = SIM_IO;                // set SIM_IO low to select SIM card
}

void sim_deselect(void) {
LPC_GPIO->SET[0] = SIM_IO;                // set SIM_IO high to deselect SIM card
}

void sim_send_byte(unsigned char data) {
for (int i = 0; ifor (int i = 0; i < 8; i++) {
LPC_GPIO->CLR[0] = SIM_CLK;             // set SIM_CLK low
if (data & (1 << (7 - i))) {
      LPC_GPIO->SET[0] = SIM_DATA;       // set SIM_DATA high
} else {
      LPC_GPIO->CLR[0] = SIM_DATA;       // set SIM_DATA low
}
LPC_GPIO->SET[0] = SIM_CLK;             // set SIM_CLK high
}
LPC_GPIO->CLR[0] = SIM_CLK;                // set SIM_CLK low
LPC_GPIO->DIR[0] &= ~SIM_DATA;             // set SIM_DATA as input
for (volatile int i = 0; i < 500; i++);    // wait for a while
unsigned char response = 0;
for (int i = 0; i < 8; i++) {
response <<= 1;
LPC_GPIO->SET[0] = SIM_CLK;             // set SIM_CLK high
if (LPC_GPIO->B[0][SIM_DATA]) {
      response |= 0x01;
}
LPC_GPIO->CLR[0] = SIM_CLK;             // set SIM_CLK low
}
LPC_GPIO->DIR[0] |= SIM_DATA;             // set SIM_DATA as output
return response;
}

void sim_receive_bytes(unsigned char *data, int len) {
for (int i = 0; i < len; i++) {
data[i] = sim_receive_byte();
}
}

void sim_send_bytes(const unsigned char *data, int len) {
for (int i = 0; i < len; i++) {
sim_send_byte(data[i]);
}
}

int main(void) {
uart_init(); // initialize UART for debugging
sim_init(); // initialize SIM card
sim_select(); // select SIM card

// TODO: implement SIM card commands here

sim_deselect();       // deselect SIM card
while (1);
return 0;
}

上面的程式碼是初始化LPC11U35FHI33/501微控制器板，以及提供了一些與SIM卡通信的函數，例如`sim_init`初始化SIM卡，`sim_select`選擇SIM卡，`sim_send_byte`發送一個字節的數據到SIM卡，以及`sim_receive_byte`接收一個字節的數據。
在`main`函數中，你可以根據需要使用這些函數來發送和接收SIM卡命令。

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