C8051F02X的功能模块应用的C语言代码举例
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Rev. 1.2 12/03 Copyright © 2003 by Silicon Laboratories AN122-DS12
AN122
ANNOTATED ‘C’ EXAMPLES FOR THE ‘F02X FAMILY
Relevant Devices
This application note applies to the following devices:
C8051F020, C8051F021, C8051F022, and
C8051F023.
Introduction
This note contains example code written in ‘C’ that
can be used as a starting point for the development
of applications based on the C8051F02x family of
devices.
Index of Programs by Peripheral
The following short descriptions provide an index
to the attached programs, organized by peripheral.
ADC0 Examples
The following are example programs which use
ADC0.
“ADC0_Buf1.c”
This program shows an example of using ADC0 in
interrupt mode using Timer3 overflows as a start-
of-conversion source to sample AIN0
<NUM_SAMPLES> times, storing the results in
XDATA space. Once <NUM_SAMPLES> have
been collected, the samples are transmitted out
UART0. Once the transmission has completed,
another <NUM_SAMPLES> of data are collected
and the process repeats.
“ADC0_Int1.c”
This program shows an example of using ADC0 in
interrupt mode using Timer3 overflows as a start-
of-conversion to measure the output of the on-chip
temperature sensor. The temperature is calculated
from the ADC0 result and is transmitted out
UART0.
“ADC0_Int2m.c”
This program shows an example of using ADC0 in
interrupt mode using Timer3 overflows as a start-
of-conversion to measure the the voltages on AIN0
through AIN7 and the temperature sensor. The
voltages are calculated from the resulting codes
and are transmitted out UART0.
“ADC0_OSA1.c”
This program shows an example of using ADC0 in
interrupt mode using Timer3 overflows as a start-
of-conversion to measure the output of the on-chip
temperature sensor. The ADC0 results are filtered
by a simple integrate-and-dump process whose
integrate/decimate ratio is given by the constant
<INT_DEC>. The temperature is calculated from
the ADC0 result and is transmitted out UART0.
“ADC0_Poll1.c”
This program demonstrates operation of ADC0 in
polled mode. The ADC0 is configured to use writes
to AD0BUSY as its start of conversion source and
to measure the output of the on-chip temperature
sensor. The temperature sensor output is converted
to degrees Celsius and is transmitted out UART0.
DAC0 Examples
The following are example programs which use
DAC0. These can easily be converted to use DAC1
if desired.
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