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器件型号：TMS320F28377D 主题中讨论的其他器件：C2000WARE
我将尝试复制 HI-3593应用手册中给出的 SPI 驱动器。
ap-southeast-1-02900067-inspect.menlosecurity.com/.../
为不同的控制器(MC9S12XD)编写了驱动程序示例
我正在尝试复制两个函数 R_Register ()和 W_CommandValue ():
以下是应用手册中针对以下两个函数的代码：
/* ------------------------------------------------------------------
/ Read HI-3110 Register Read Function
/ ------------------------------------------------------------------
Argument(s): Register to read
Return: 8-bit Register Value
*/
unsigned char R_Register(char Reg)
{
unsigned char R_Reg;
SPI0CR1 = SPI0CR1 & ~SPI0CR1_SSOE_MASK; // disable auto /SS output, reset /SS Output Enable
SPI0CR2 = SPI0CR2 & ~SPI0CR2_MODFEN_MASK; // disable auto /SS output, reset SPI0 Mode Fault
SPI0_nSS = 0; // assert the SPI0 /SS strobe
R_Reg = txrx8bits(Reg, 1); // send op code (ignore returned data byte)
R_Reg = txrx8bits(0x00, 1); // send dummy data / receive Status Reg byte
SPI0_nSS = 1; // negate the SPI0 /SS strobe
SPI0CR1 = SPI0CR1 | SPI0CR1_SSOE_MASK; // enable auto /SS output, set /SS Output Enable
SPI0CR2 = SPI0CR2 | SPI0CR2_MODFEN_MASK; // enable auto /SS output, set SPI0 Mode Fault
return R_Reg;
}
// Write SPI Command with a Value to HI-3593
void W_CommandValue(uint8 cmd, uint8 value)
{
uint8 dummy;
SPI0CR1 = SPI0CR1 & ~SPI0CR1_SSOE_MASK; // disable auto /SS output, reset /SS Output
SPI0CR2 = SPI0CR2 & ~SPI0CR2_MODFEN_MASK; // disable auto /SS output, reset SPI0 Mode
SPI0_nSS = 0; // assert the SPI0 /SS strobe
dummy = SPI0SR; // clear SPI status register
SPI0DR = cmd; // SPI command
while (!SPI0SR_SPIF)
;
dummy = SPI0DR; // read Rx data in Data Reg to reset SPIF
dummy = SPI0SR; // clear SPI status register
SPI0DR = value; // Reset values
while (!SPI0SR_SPIF)
;
dummy = SPI0DR; // read Rx data in Data Reg to reset SPIF
SPI0_nSS = 1; // negate the SPI0 /SS strobe
SPI0CR1 = SPI0CR1 | SPI0CR1_SSOE_MASK; // enable auto /SS output, set /SS Output Enable
SPI0CR2 = SPI0CR2 | SPI0CR2_MODFEN_MASK; // enable auto /SS output, set SPI0 Mode Default
}
这些是我的等效函数：
void W_CommandValue(uint16_t cmd, uint16_t value)
{
//Pull the cs pin to low.
GPIO_writePin(SPIA_CS_PIN, 0);
//Wait for 100 us.
DEVICE_DELAY_US(100);
//Read the dummy data.
SPI_readDataNonBlocking(A429_SPI);
//Wait for 100 us.
DEVICE_DELAY_US(100);
//Write the command.
SPI_writeDataNonBlocking(A429_SPI, cmd);
//Wait for 100 us.
DEVICE_DELAY_US(100);
//Read the dummy data.
SPI_readDataNonBlocking(A429_SPI);
//Wait for 100 us.
DEVICE_DELAY_US(100);
//Write the value.
SPI_writeDataNonBlocking(A429_SPI, value);
//wait 100 us.
DEVICE_DELAY_US(100);
//Read the dummy data.
SPI_readDataNonBlocking(A429_SPI);
//wait 100 us.
DEVICE_DELAY_US(100);
//Pull the cs pin to high.
GPIO_writePin(SPIA_CS_PIN, 1);
//wait 100 us.
DEVICE_DELAY_US(100);
}
uint16_t R_Register(uint16_t cmd)
{
uint16_t value = 0;
//Pull the cs pin to low.
GPIO_writePin(SPIA_CS_PIN, 0);
//Wait for 100 us.
DEVICE_DELAY_US(100);
//Write the command.
SPI_writeDataNonBlocking(A429_SPI, cmd);
//Wait for 100 us.
DEVICE_DELAY_US(100);
//Read the dummy byte.
SPI_readDataNonBlocking(A429_SPI);
//Wait for 100 us.
DEVICE_DELAY_US(100);
//Transmit dummy data.z
SPI_writeDataNonBlocking(A429_SPI, 0x00);
//Wait for 100 us.
DEVICE_DELAY_US(100);
//Read the received byte.
value = SPI_readDataNonBlocking(A429_SPI);
//Wait for 100 us.
DEVICE_DELAY_US(100);
//Pull the cs pin to high.
GPIO_writePin(SPIA_CS_PIN, 1);
return value;
}
但 无法 正常通信。
我测试了两个函数、如下所示：
void initHI3593()
{
//将上升沿赋予 HI-3593以执行硬件复位。
GPIO_writePin (A429_CA_RESET、0)；
device_delay_us (100)；
GPIO_writePin (A429_CA_RESET、1)；
//写入 ACLK 分频寄存器(0x1400)
device_delay_us (100)；
W_CommandValue (0x3800、0x1400)；
device_delay_us (100)；
testVar = R_Register (0xD400)；
｝
testVar 的值应该是0x14、但是得到的值是0x00。
有任何关于什么问题的疑虑吗？
