参数资料
型号: ADUC7032BSTZ-88-RL
厂商: Analog Devices Inc
文件页数: 14/120页
文件大小: 0K
描述: IC MCU 96K FLASH DUAL 48LQFP
标准包装: 2,000
系列: MicroConverter® ADuC7xxx
核心处理器: ARM7
芯体尺寸: 16/32-位
速度: 20.48MHz
连通性: LIN,SPI,UART/USART
外围设备: POR,PSM,温度传感器,WDT
输入/输出数: 9
程序存储器容量: 96KB(48K x 16)
程序存储器类型: 闪存
RAM 容量: 1.5K x 32
电压 - 电源 (Vcc/Vdd): 3.5 V ~ 18 V
数据转换器: A/D 2x16b
振荡器型: 内部
工作温度: -40°C ~ 105°C
封装/外壳: 48-LQFP
包装: 带卷 (TR)
ADuC7032-8L
Rev. A | Page 110 of 120
Example LIN Hardware Synchronization Routine
Consider the following C-source code LIN initialization routine:
void LIN_INIT(void )
{
char HVstatus;
GP2CON = 0x110000;
// Enable LHS on GPIO pins
LHSCON0 = 0x1;
// Reset LHS interface
do{
HVDAT = 0x02;
// Enable normal LIN TX mode
HVCON = 0x08;
// Write to Config0
do{
HVstatus = HVCON;
}
while(HVstatus & 0x1); // Wait until command is finished
}
while (!(HVstatus & 0x4));
// Transmit command is correct
while((LHSSTA & 0x20) == 0 )
{
// Wait until the LHS hardware is reset
}
LHSCON1 = 0x062;
// Sets stop edge as the fifth falling edge
// and the start edge as the first falling
// edge in the sync byte
LHSCON0 = 0x0114;
// Gates UART RX line, ensure no interference
// from the LIN into the UART
// Selects the stop condition as a falling edge
// Enables generation of an interrupt on the
// stop condition
// Enables the interface
LHSVAL1 = 0x03F;
// Set number of 131 kHz periods to generate
// a break interrupt 0x3F / 131 kHz ~ 480 s
// which is just over 9.5 tbits
}
Using this configuration, LHSVAL1 begins to count on the first
falling edge received on the LIN bus. If LHSVAL1 exceeds the
value written to LHSVAL1, in this case 0x3F, a break compare
interrupt is generated.
On the next falling edge, LHSVAL0 begins counting. LHSVAL0
monitors the number of falling edges and compares this number
to the value written to LHSCON1. In this example, the edge to
monitor is the sixth falling edge of the LIN frame, or the fifth
falling edge of the sync byte.
After the number of falling edges is received, a stop condition
interrupt is generated. It is at this point that the UART is
configured to receive the protected identifier.
The UART must not be ungated, through LHSCON0[8], before
the LIN bus returns high. If this occurs, UART communication
errors may occur. This process is shown in detail in Figure 46.
Example code follows.
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